IEC TS 62370:2004

Electroacoustics - Instruments for the measurement of sound intensity - Electromagnetic and electrostatic compatibility requirements and test procedures

This Technical Specification specifies requirements for instruments that measure sound intensity using pairs of pressure sensing microphones with respect to their immunity to power- and radio-frequency fields and to electrostatic discharge, and the permitted radio-frequency emissions, together with test procedures to verify conformance. Sound intensity measuring instruments are available in many different configurations and may be powered by batteries or from external power supply systems. The technical requirements in this Technical Specification apply to all configurations of instruments for the measurement of sound intensity. The electromagnetic and electrostatic compatibility requirements are equally applicable for sound intensity measuring instruments used in residential, commercial and light-industrial environments, or industrial sites. The requirements of this Technical Specification are additional to those contained in IEC 61043 and do not alter any of the specifications contained therein. The requirements do not apply retrospectively to sound intensity measuring instruments complying with IEC 61043 prior to the publication of this Technical Specification.

Electroacoustique - Instruments pour la mesure de l'intensité acoustique - Exigences concernant les compatibilités électromagnétiques et électrostatiques et procédures d'essai

La présente Spécification technique spécifie, pour les instruments qui mesurent l'intensité acoustique au moyen d'une paire de microphones de pression, des exigences qui sont en rapport avec leur immunité à des champs électriques à la fréquence du secteur ou à fréquence radioélectrique, ainsi qu'à des décharges électrostatiques, ou avec les émissions à fréquence radioélectrique tolérées, et décrit également les procédures d'essai destinées à vérifier leur conformité à ces exigences. Les instruments de mesure de l'intensité acoustique sont disponibles dans de nombreuses configurations différentes et peuvent être alimentés par batteries ou par des sources d'alimentation extérieures. Les exigences techniques de la présente Spécification technique s'appliquent à toutes les configurations d'instruments destinés à la mesure de l'intensité acoustique. Les exigences concernant les compatibilités électromagnétiques et électrostatiques s'appliquent aux instruments de mesure de l'intensité acoustique utilisés aussi bien dans des environnements résidentiels, commerciaux et d'industrie légère que dans des sites industriels. Les exigences contenues dans la présente Spécification technique complètent celles qui sont contenues dans la CEI 61043 et ne modifient aucune des spécifications qui y sont incluses. Les exigences ne s'appliquent pas rétrospectivement aux instruments de mesure de l'intensité acoustique satisfaisant à la CEI 61043 avant la publication de la présente Spécification technique.

General Information

• Status: Published
• Publication Date: 07-Mar-2017
• ICS: 17.140.50 - Electroacoustics
• ICS: 33.100.10 - Emission
• ICS: 33.100.20 - Immunity
• Technical Committee: TC 29 - Electroacoustics
• Current Stage: PPUB - Publication issued
• Start Date: 10-May-2004
• Completion Date: 31-May-2004

Relations

• Amended By: IEC TS 62370:2004/AMD1:2017 - Amendment 1 - Electroacoustics - Instruments for the measurement of sound intensity - Electromagnetic and electrostatic compatibility requirements and test procedures
• Effective Date: 05-Sep-2023

Overview

IEC TS 62370:2004 (consolidated with AMD1:2017) is a Technical Specification from the IEC that defines electromagnetic and electrostatic compatibility (EMC/ESD) requirements and test procedures for instruments that measure sound intensity using pairs of pressure-sensing microphones. It specifies immunity to power- and radio-frequency fields, immunity to electrostatic discharge, permitted radio‑frequency emissions, and verification test methods. These requirements are additional to IEC 61043 and apply to all instrument configurations (battery-powered, mains-powered, or multi-component systems).

Key Topics

• Scope and applicability: Requirements apply to sound intensity measuring systems used in residential, commercial, light-industrial, and industrial environments. They do not retroactively change instruments that complied with IEC 61043 before this TS.
• System groups: Classification into Group X (battery-operated, self-contained), Group Y (mains-powered, self-contained), and Group Z (multi-component systems requiring interconnection).
• Emission limits: Radio‑frequency emission limits are based on CISPR/IEC generic emission standards (summarized in Annex A). Group Y/Z systems must also meet conducted disturbance limits on mains ports.
• Immunity requirements: Tests for immunity to radiated RF fields, conducted disturbances, and electrostatic discharge are referenced to IEC 61000-4-2, IEC 61000-4-3 and IEC 61000-4-20, plus generic immunity standards IEC 61000-6-1 and IEC 61000-6-2.
• Test procedures: Clause 5 details measurement set-up and procedures for emission measurements, ESD tests, and RF immunity, including probe plus processing system testing and specification of cables/accessories.
• Documentation: Clause 6 specifies information to be included in instruction manuals to support safe and EMC‑compliant operation.

Applications

• Manufacturers of sound intensity probes and analysers use IEC TS 62370 to design for EMC and to prepare compliance test plans.
• EMC test laboratories adopt the test procedures in Clause 5 to verify immunity and emissions of sound intensity systems.
• Acoustic consultants and product engineers rely on the TS when specifying measurement equipment for field or laboratory use in noisy electromagnetic environments.
• Procurement and regulatory teams reference the TS when evaluating instrument suitability for residential, commercial, or industrial applications.

Related Standards

• IEC 61043 - Electroacoustics: sound intensity measurement with microphone pairs
• IEC 61000-4-2 - ESD immunity testing
• IEC 61000-4-3 - Radiated RF immunity testing
• IEC 61000-4-20 - TEM waveguide emission/immunity testing
• IEC 61000-6-1 / 6-2 - Generic immunity standards
• CISPR 22 / CISPR/IEC 61000-6-3 - Emission limits for information technology and general environments

IEC TS 62370 is essential for ensuring that sound intensity measuring instruments perform reliably in real-world electromagnetic environments while meeting emission and immunity expectations. Keywords: IEC TS 62370, electroacoustics, sound intensity, EMC, ESD, electromagnetic compatibility, microphone probes, test procedures.

Standards Content (Sample)

IEC TS 62370 ®
Edition 1.1 2017-03
CONSOLIDATED VERSION
TECHNICAL
SPECIFICATION
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Electroacoustics – Instruments for the measurement of sound intensity –
Electromagnetic and electrostatic compatibility requirements and test
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IEC TS 62370 ®
Edition 1.1 2017-03
CONSOLIDATED VERSION
TECHNICAL
SPECIFICATION
colour
inside
Electroacoustics – Instruments for the measurement of sound intensity –

Electromagnetic and electrostatic compatibility requirements and test

procedures
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 17.140.50; 33.100.10; 33.100.20 ISBN 978-2-8322-4087-8

IEC TS 62370 ®
Edition 1.1 2017-03
CONSOLIDATED VERSION
REDLINE VERSION
colour
inside
Electroacoustics – Instruments for the measurement of sound intensity –
Electromagnetic and electrostatic compatibility requirements and test
procedures
– 2 – IEC TS 62370:2004+AMD1:2017 CSV
 IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Electromagnetic and electrostatic compatibility requirements . 6
4.1 General . 6
4.2 Emission limits . 7
4.3 Electrostatic discharges . 7
4.4 Immunity to power- and radio-frequency fields and conducted disturbances . 7
5 Test procedures . 9
5.1 General . 9
5.2 Emission measurements . 9
5.3 Tests for electrostatic discharge . 10
5.4 Tests for immunity to power- and radio-frequency fields and conducted
disturbances . 10
6 Information to be included in the instruction manual . 11
Annex A (informative)  Radio-frequency emission limits . 12
Bibliography . 13

Table A.1 – Limits for radiated disturbance of Class B information technology
equipment (ITE) at a measuring distance of 10 m . 12
Table A.2 – Limits for conducted disturbance at the mains ports of Class B ITE . 12

© IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
INSTRUMENTS FOR THE MEASUREMENT OF SOUND INTENSITY –
ELECTROMAGNETIC AND ELECTROSTATIC COMPATIBILITY
REQUIREMENTS AND TEST PROCEDURES
FOREWORD
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This consolidated version of the official IEC Standard and its amendment has been prepared
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IEC TS 62370 edition 1.1 contains the first edition (2004-05) [documents 29/540/DTS and
29/544A/RVC] and its amendment 1 (2017-03) [documents 29/916/DTS and 29/939/RVDTS].
In this Redline version, a vertical line in the margin shows where the technical content is
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 IEC 2017
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IEC 62370, which is a technical specification, has been prepared by IEC technical
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 IEC 2017
ELECTROACOUSTICS –
INSTRUMENTS FOR THE MEASUREMENT OF SOUND INTENSITY –
ELECTROMAGNETIC AND ELECTROSTATIC COMPATIBILITY
REQUIREMENTS AND TEST PROCEDURES

1 Scope
1.1 This Technical Specification specifies requirements for instruments that measure sound
intensity using pairs of pressure sensing microphones with respect to their immunity to power-
and radio-frequency fields and to electrostatic discharge, and the permitted radio-frequency
emissions, together with test procedures to verify conformance. Sound intensity measuring
instruments are available in many different configurations and may be powered by batteries or
from external power supply systems. The technical requirements in this Technical
Specification apply to all configurations of instruments for the measurement of sound
intensity.
1.2 The electromagnetic and electrostatic compatibility requirements are equally applicable
for sound intensity measuring instruments used in residential, commercial and light-industrial
environments, or industrial sites. The requirements of this Technical Specification are
additional to those contained in IEC 61043 and do not alter any of the specifications
contained therein. The requirements do not apply retrospectively to sound intensity measuring
instruments complying with IEC 61043 prior to the publication of this Technical Specification.
NOTE 1 Compliance with this Technical Specification does not insure that the sound intensity measuring system
is immune to interference from all electromagnetic sources.
NOTE 2 These requirements are the first attempt at defining electromagnetic and electrostatic compatibility
requirements for sound intensity measuring systems. Requirements can be changed later when wider experience
has been gained if found necessary.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 2: Electrostatic discharge immunity test
IEC 61000-4-3:2002, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measure-
ment techniques – Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2002)
IEC 61000-4-20:2010, Electromagnetic compatibility (EMC) – Part 4-20: Testing and
measurement techniques – Emission and immunity testing in transverse electromagnetic
(TEM) waveguides
IEC 61000-6-1:1997, Electromagnetic compatibility (EMC) – Part 6: Generic standards –
Section 1: Immunity for residential, commercial and light-industrial environments
IEC 61000-6-2:1999, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity for industrial environments
CISPR/IEC 61000-6-3:1996, Electromagnetic compatibility (EMC) – Part 6: Generic standards
– Section 3: Emission standard for residential, commercial and light-industrial environments

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 IEC 2017
IEC 61043, Electroacoustics – Instruments for the measurement of sound intensity –
Measurement with pairs of pressure sensing microphones
CISPR 22:2003, Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement
3 Terms and definitions
For the purpose of this document, the following definitions apply in addition to those specified
in IEC 61000-4-2, IEC 61000-4-3, IEC 61000-6-1, IEC 61000-6-2 and CISPR 61000-6-3.
3.1
reference orientation (of a sound intensity measuring system)
orientation of a sound intensity measuring system with respect to the principal direction of an
emitter or receiver of radio frequency fields
3.2
group X sound intensity measuring system
self-contained instrument which includes sound intensity measuring facilities according to this
Technical Specification and which specifies internal battery power for the normal mode of
operation, requiring no external connections to other apparatus to operate the instrument
3.3
group Y sound intensity measuring system
self contained instrument which includes sound intensity measuring facilities according to this
Technical Specification and which specifies connection to a public power supply system for
the normal mode of operation, requiring no external connections to other apparatus to operate
the instrument.
3.4
group Z sound intensity measuring system
instrument that includes sound intensity measuring facilities according to this Technical
Specification requiring two or more items of equipment to be connected together by some
means for the normal mode of operation, with operation either from batteries or from a public
power supply
4 Electromagnetic and electrostatic compatibility requirements
4.1 General
4.1.1 This clause specifies requirements for sound intensity measuring systems with respect
to their immunity to power- and radio-frequency electromagnetic fields and to electrostatic
discharge, and the permitted radio-frequency emissions, together with Clause 5 which
specifies test procedures to demonstrate conformance to the specifications of this Technical
Specification. Sound intensity measuring systems are available in many different
configurations and may be powered by batteries or from external power supply systems.
For conformance with these requirements, a probe and a processing system shall be tested
together, and the system this comprises shall be specified with all necessary cables and
accessories. The technical requirements in this clause are for three sound intensity measuring
system configurations: first, Group X, for self-contained instruments that are designed
primarily for battery operation; second, Group Y, for self-contained instruments that
incorporate sound intensity measuring facilities according to this Technical Specification and
that are operated from public power supply systems; third, Group Z, for sound intensity
measuring systems that are formed by interconnection of two or more items of equipment (for
the purposes of EMC testing, the probe is not a separate item of equipment).

 IEC 2017
4.1.2 The electromagnetic and electrostatic compatibility requirements are equally
applicable for sound intensity measuring systems used in residential, commercial and light-
industrial environments, or industrial sites. The requirements of this clause are additional to
those contained in IEC 61043 and do not alter any of the specifications for sound intensity
measuring systems or parts thereof contained therein.
4.2 Emission limits
4.2.1 The upper limits on radio-frequency emissions from any apparatus are defined for
compatibility with many different standards with the limits laid down in Table 1 of
CISPR 61000-6-3:1996, forming the basic requirements for sound intensity measuring
systems in groups X, Y or Z. These are summarized in Annex A.
4.2.2 Sound intensity measuring systems in groups Y or Z powered from a public power
supply system shall also comply with the limits for disturbance to the public supply system
specified in CISPR 22 for Class B equipment. For sound intensity measuring systems, the
requirements are summarized in Annex A.
4.2.3 The instruction manual shall state the configuration of, the mode of operation of, and the
connecting devices (if any) to, the instrument that produce the greatest radio-frequency
emissions.
4.3 Electrostatic discharges
4.3.1 Sound intensity measuring systems in groups X, Y or Z shall withstand electrostatic
discharges of specified magnitudes. The requirements are those specified in 1.4 of Table 1 in
IEC 61000-6-1:1997 and are summarized as follows:
– contact discharges up to 4 kV and air discharges up to 8 kV with both positive and
negative voltages. The polarity of the electrostatic voltage is with respect to earth ground.
4.3.2 Clause 5 of IEC 61000-6-1 specifies performance criterion B during and after
electrostatic discharge tests, given as follows:
"The apparatus shall continue to operate as intended after the test. No degradation of
performance or loss of function is allowed below a performance level specified by the
manufacturer, when the apparatus is used as intended. The performance level may be
replaced by a permissible loss of performance. During the test, degradation of performance is
however allowed. No change of actual operating state or stored data is allowed. If the
minimum performance level or the permissible performance loss is not specified by the
manufacturer, either of these may be derived from the product description and documentation
and what the user may reasonably expect from the apparatus if used as intended".
The term “apparatus” means any sound intensity measuring system conforming to this
Technical Specification.
NOTE An example of a permissible loss of performance could be the display of the apparatus becoming
unreadable during the execution of discharges, but returning to full operation following completion of the
discharges.
4.3.3 After each and every electrostatic discharge test is complete, the sound intensity
measuring system shall be fully operational and in a configuration identical to that established
before the start of the electrostatic discharge tests. Previously stored data (if any) shall
remain unchanged.
4.4 Immunity to power- and radio-frequency fields and conducted disturbances
4.4.1 Sound intensity measuring systems in groups X, Y and Z shall exhibit a minimum
degree of immunity over a range of power- and radio- frequencies and field strengths. The
requirements are those specified in 1.1 of Table 1 in IEC 61000-6-1:1997 and 1.2 of Table 1

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 IEC 2017
in IEC 61000-6-2:1999 with minor amendments. These amendments extend the range of
radio-frequency fields to cover from 27 MHz to 1 000 MHz, and increase the field strength for
the power frequency field to 80 A/m. The requirements can be summarised as follows:
– frequency range from 27 MHz to 1 000 MHz. Root-mean-square electric field strength up
to and including 10 V/m (unmodulated) with 80 % sinusoidal amplitude modulation at
1 kHz,
– uniform root-mean-square alternating magnetic field of 80 A/m strength at 50 Hz or 60 Hz.
4.4.2 For sound intensity measuring systems in groups Y or Z that are connected to a public
power supply, the instruments shall also conform to additional requirements. These
requirements are given in Table 4 of IEC 61000-6-2:1999.
4.4.3 For sound intensity measuring systems in group Z, and where any interconnecting
cable between any two parts of the system (excluding any cable between the probe and the
processor) exceeds 3 m in length, the instruments shall also conform to the requirements of
Table 2 in IEC 61000-6-2:1999.
4.4.4 For all groups of sound intensity measuring systems, the immunity of any instrument to
power and radio-frequency fields shall be demonstrated by placing the probe in a known
sound field whilst maintaining both the probe and the processor in a near-uniform power or
radio-frequency field. The sound field shall consist of a pure sinusoidal tone of 925 Hz
simulating a sound field with a sound intensity level of 74 dB ± 0,5 dB and a pressure
intensity (PI) indicator of 5 dB. The PI indicator displays the difference between the sound
intensity and sound pressure levels in an actual sound field. This source may be applied to
the microphones in any way that does not alter the susceptibility of the probe or the source to
power and radio-frequency emissions. The sound intensity measuring system shall be
positioned in the reference orientation relative to the source of radio-frequency emissions as
specified in the instruction manual. The probe shall be positioned close to the processor unit
as defined for the reference orientation and fitted with a spacer of not more than 25 mm
length. Excess cable shall be folded back on itself in a figure of eight configuration with an
even number of folds of equal length, typically 250 mm long, and all parts secured closely
together at each end of the folds, and in their centre.
NOTE A non-conductive standing wave tube may be a means of creating this field.
4.4.5 During testing, the sound intensity measuring system shall be set for the normal mode
of operation as described in the instruction manual. It shall be turned on, powered by its
preferred supply, and set to read sound pressure level. The level range control shall be set (if
applicable) to a range where overload occurs between 90 dB and 110 dB.
4.4.6 When the power-frequency or radio-frequency field as specified in 4.4.1 is applied, the
indication of the sound intensity measuring system shall not change by more than ±1 dB for a
Class 1 system or ±2 dB for a Class 2 system.
4.4.7 When testing the additional requirements in 4.4.2 and 4.4.3, the susceptibility of the
sound intensity measuring system shall not change by more than ±1 dB for a Class 1 system
or ±2 dB for a Class 2 system when these tests are applied. No power- or radio-frequency
field is applied during the testing for conformance to these additional requirements.
4.4.8 The instruction manual shall state the configuration, the mode of operation and the
connecting devices (if any) that produce the minimum immunity to power- and radio-frequency
fields.
 IEC 2017
5 Test procedures
5.1 General
5.1.1 The tests described in this subclause shall be carried out unless the particular
configuration of the sound intensity measuring system renders them inappropriate, in which
case equivalent tests should be substituted if equivalence to these tests can be
demonstrated. Unless stated otherwise, these tests apply to sound intensity measuring
systems in groups X, Y, and Z.
5.1.2 During testing, the sound intensity measuring system under test shall be set in the
configuration for the normal mode of operation as described in the instruction manual. The
instrument shall be turned on, powered by its preferred source of supply, and set to read the
1 kHz octave or third-octave band.
5.1.3 Full details of equipment required to perform the tests and the methods of executing
them are mostly contained in other standards with the additional requirements for sound
intensity measuring systems specified in this clause. Other standards listed in Clause 2 shall
be referred to for all relevant tests.
5.2 Emission measurements
5.2.1 The instrument under test shall be configured and set according to the specification in
the instruction manual to produce the greatest emissions in the frequency range being
investigated.
5.2.2 Measurements of emissions shall be performed as described in Clauses 6 and 10 of
CISPR 22:2003. All results from measurements of radiated emissions shall conform to the
requirements for enclosure ports given in 4.2.1.
5.2.3 The instrument under test shall initially be tested in the reference orientation with the
probe cable arranged as in 4.4.4 if appropriate.
5.2.4 Maintaining the configuration of 5.2.3, the instrument under test shall be tested for
emissions in at least one other plane, each orthogonal to the reference orientation, within the
limits of suitable positioning for the measuring system employed.
5.2.5 Any fixtures and fittings used to maintain the position of the instrument under test
(including the probe and any cables if appropriate) shall be such as to have no significant
influence on the measurement of any emissions from the instrument.
5.2.6 If the instrument under test is fitted with a connection device that allows interface or
interconnection cables to be attached to it, then all tests of emissions shall be carried out with
cables connected to all available connection devices. All cables shall be left unterminated and
be arranged as described in Clause 8 of CISPR 22:2003, unless the manufacturer of the
sound intensity measuring system also supplies the device connected to the sound intensity
measuring system by this cable, in which case all items shall be tested together.
5.2.7 Where several connections may be made to the same connecting device, emissions
shall be measured only with the configuration that produces the greatest emissions. Other
configurations emitting similar or lower levels of emissions may be included in the instruction
manual in a list of compliant configurations without further testing, provided the tested
configuration fully conforms with the limits of 4.2.
5.2.8 For sound intensity measuring systems in groups Y and Z connected to a public power
supply, disturbances conducted to the public power supply shall be measured as described in
CISPR 22 and shall conform to the requirements of Clause 5 of this Technical Specification
for Class B equipment.
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 IEC 2017
5.3 Tests for electrostatic discharge
5.3.1 Equipment required and methods of testing are described in IEC 61000-4-2.
5.3.2 If the instrument under test is fitted with connection devices that are not required as
part of the configuration for the normal mode of operation, then no cables shall be fitted
during the electrostatic-discharge test. Discharges shall not be made to pins on connectors
that are recessed behind the surface of either the connector or the sound intensity measuring
system
5.3.3 Any supports or other items used to maintain the position of the instrument under test
during testing shall not obscure any part of sound intensity measuring system required for
access for static discharge, nor shall they affect the testing of the sound intensity measuring
system.
5.3.4 Contact and air discharges of all required polarities and voltages shall be applied
10 times each to all appropriate parts of the instrument under test.
NOTE Care should be taken to ensure that the sound intensity measuring system under test is fully discharged
from any effects of each test before repeating the application of a discharge.
5.3.5 If the instruction manual specifies a temporary performance degradation or loss of
function after the electrostatic discharge tests, this degradation or loss of function shall not
allow any reduced operation, change of configuration or corruption or loss of any stored data.
5.4 Tests for immunity to power- and radio-frequency fields and conducted
disturbances
5.4.1 The equipment required and the test methods needed to test for radio-frequency fields
are described in IEC 61000-4-3. An alternative test method using Transverse Electromagnetic
(TEM) waveguides may be employed for immunity testing. The requirements that shall be
applied for the TEM waveguide are specified in IEC 61000-4-20, and Annex B of
IEC 61000-4-20:2010 defines methods of implementing the testing. The performance
requirements for the instrument under test are unchanged including the range of frequencies
tested and step size.
5.4.2 Testing shall first be made in the reference orientation with any probe cables arranged
as described in 4.4.4. The signal from the acoustic source described in 4.4.4 shall be applied.
5.4.3 Tests for immunity to radio-frequency fields may be performed at discrete frequencies
with increments of up to 4 % for frequencies less than 500 MHz and up to 2 % for all other
frequencies. Dwell time at each frequency shall be appropriate to the sound intensity
measuring system under test. Testing at a limited number of discrete frequencies does not
negate the need to meet the requirements of 4.4 at all frequencies within the specified range.
Testing at 1% increments may be required to satisfy other standards requirements.
5.4.4 If the instrument under test is fitted with any connection device that allows interface or
interconnection cables to be attached to it, then all tests for immunity to power- and radio-
frequency fields shall be performed with cables connected to all available connection devices.
All cables shall be left unterminated and shall be arranged as described in Clause 8 of
CISPR 22:2003 unless the supplier of the sound intensity measuring system also supplies the
device connected to the sound intensity measuring system by this cable, in which case all
items shall be tested together.
5.4.5 Where several connections may be made to the same connecting device, tests shall be
performed only with the configuration specified in the instruction manual as producing
minimum immunity. Other configurations that are equally or more immune may be included in
the instruction manual in a list of conforming configurations without further testing, provided
the tested configuration fully conforms to the limits of 4.4.

 IEC 2017
5.4.6 Power-frequency testing shall be at 50 Hz or 60 Hz. The acoustic source of 4.4.4. and
any connections to the sound intensity measuring system shall be made in a manner that has
no influence on the power frequency field
5.4.7 Maintaining the configuration of 5.4.2 and 5.4.4, the instrument under test shall be
tested in at least one other plane, each orthogonal to the reference orientation, within the
limits of suitable positioning for the radio-frequency transmitting system employed.
5.4.8 During testing, the instrument under test shall remain fully operational and in the same
configuration as it was before testing commenced.
5.4.9 For sound intensity measuring systems in groups Y and Z operating from a public
power supply, tests shall be performed to demonstrate conformance to the additional
specifications given in 4.4.2.
5.4.10 For sound intensity measuring systems in group Z using or specifying interconnecting
cables (other than the probe cable) longer than 3 m and approved by the manufacturer, tests
shall be performed to demonstrate conformance to the additional specifications given in 4.4.3.
6 Information to be included in the instruction manual
The instruction manual shall contain the following:
a) the configuration for the reference orientation and method of securing the microphone
cable, if appropriate.
b) the approved cables and accessories as required for the tests of 5.2.6 and 5.4.4;
c) the configuration for the normal mode of operation;
d) any specified degradation in performance or loss of functionality following the application
of electrostatic discharges;
e) the setting and configuration within a normal method of operation for greatest radio-
frequency emissions;
f) the mode of operation, within a normal method of operation, and connecting devices that
produce minimum immunity to power- and radio-frequency fields.

– 12 – IEC TS 62370:2004+AMD1:2017 CSV
 IEC 2017
Annex A
(informative)
Radio-frequency emission limits

Table A.1 – Limits for radiated disturbance of Class B information technology
equipment (ITE) at a measuring distance of 10 m
Frequency range Quasi-peak limits
dB (µV/m)
MHz
30 to 230 30
230 to 1 000 37
NOTE 1 The lower limit applies at the transition frequency.
NOTE 2 Additional provisions may be required for cases where interference occurs.

NOTE The characteristics of a quasi-peak receiver are specified in 4.2 of CISPR 16-1-1:2003. The reference level
for quasi-peak signals is 1 µV/m.
For sound intensity measuring systems powered from a public supply, the requirements given
in Table A.2 shall also be fulfilled.
Table A.2 – Limits for conducted disturbance at the mains ports of Class B ITE
Limits
Frequency range
dB (µV/m)
MHz
Quasi-peak Average
0,15 to 0,50 66 to 56 56 to 46
0,50 to 5 56 46
5 to 30 60 50
NOTE 1 The lower limit applies at the transition frequencies.
NOTE 2 The limit decreases linearly with the logarithm of the frequency in the range
0,15 MHz to 0,50 MHz.
 IEC 2017
Bibliography
CISPR 16-1-1:2003, Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-1: Radio disturbance and immunity measuring apparatus – Measuring
apparatus
___________
IEC TS 62370 ®
Edition 1.1 2017-03
CONSOLIDATED VERSION
FINAL VERSION
Electroacoustics – Instruments for the measurement of sound intensity –
Electromagnetic and electrostatic compatibility requirements and test
procedures
– 2 – IEC TS 62370:2004+AMD1:2017 CSV
 IEC 2017
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 6
4 Electromagnetic and electrostatic compatibility requirements . 6
4.1 General . 6
4.2 Emission limits . 7
4.3 Electrostatic discharges . 7
4.4 Immunity to power- and radio-frequency fields and conducted disturbances . 7
5 Test procedures . 9
5.1 General . 9
5.2 Emission measurements . 9
5.3 Tests for electrostatic discharge . 10
5.4 Tests for immunity to power- and radio-frequency fields and conducted
disturbances . 10
6 Information to be included in the instruction manual . 11
Annex A (informative)  Radio-frequency emission limits . 12
Bibliography . 13

Table A.1 – Limits for radiated disturbance of Class B information technology
equipment (ITE) at a measuring distance of 10 m . 12
Table A.2 – Limits for conducted disturbance at the mains ports of Class B ITE . 12

© IEC 2017
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
INSTRUMENTS FOR THE MEASUREMENT OF SOUND INTENSITY –
ELECTROMAGNETIC AND ELECTROSTATIC COMPATIBILITY
REQUIREMENTS AND TEST PROCEDURES
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
This consolidated version of the official IEC Standard and its amendment has been prepared
for user convenience.
IEC TS 62370 edition 1.1 contains the first edition (2004-05) [documents 29/540/DTS and
29/544A/RVC] and its amendment 1 (2017-03) [documents 29/916/DTS and 29/939/RVDTS].
This Final version does not show where the technical content is modified by amendment 1. A
separate Redline version with all changes highlighted is available in this publication.

– 4 – IEC TS 62370:2004+AMD1:2017 CSV
 IEC 2017
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to dec
...

SPÉCIFICATION CEI
TECHNIQUE
IEC
TS 62370
TECHNICAL
Première édition
SPECIFICATION
First edition
2004-05
Electroacoustique –
Instruments pour la mesure
de l'intensité acoustique –
Exigences concernant les compatibilités
électromagnétiques et électrostatiques
et procédures d'essai
Electroacoustics –
Instruments for the measurement
of sound intensity –
Electromagnetic and electrostatic
compatibility requirements and
test procedures
Numéro de référence
Reference number
CEI/IEC/TS 62370:2004
Numérotation des publications Publication numbering
Depuis le 1er janvier 1997, les publications de la CEI As from 1 January 1997 all IEC publications are
sont numérotées à partir de 60000. Ainsi, la CEI 34-1 issued with a designation in the 60000 series. For
devient la CEI 60034-1. example, IEC 34-1 is now referred to as IEC 60034-1.
Editions consolidées Consolidated editions
Les versions consolidées de certaines publications de la The IEC is now publishing consolidated versions of its
CEI incorporant les amendements sont disponibles. Par publications. For example, edition numbers 1.0, 1.1
exemple, les numéros d’édition 1.0, 1.1 et 1.2 indiquent and 1.2 refer, respectively, to the base publication,
respectivement la publication de base, la publication de the base publication incorporating amendment 1 and
base incorporant l’amendement 1, et la publication de the base publication incorporating amendments 1
base incorporant les amendements 1 et 2. and 2.
Informations supplémentaires Further information on IEC publications
sur les publications de la CEI
Le contenu technique des publications de la CEI est The technical content of IEC publications is kept
constamment revu par la CEI afin qu'il reflète l'état under constant review by the IEC, thus ensuring that
actuel de la technique. Des renseignements relatifs à the content reflects current technology. Information
cette publication, y compris sa validité, sont dispo- relating to this publication, including its validity, is
nibles dans le Catalogue des publications de la CEI available in the IEC Catalogue of publications
(voir ci-dessous) en plus des nouvelles éditions, (see below) in addition to new editions, amendments
amendements et corrigenda. Des informations sur les and corrigenda. Information on the subjects under
sujets à l’étude et l’avancement des travaux entrepris consideration and work in progress undertaken by the
par le comité d’études qui a élaboré cette publication, technical committee which has prepared this
ainsi que la liste des publications parues, sont publication, as well as the list of publications issued,
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• IEC Just Published • IEC Just Published
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Si vous avez des questions au sujet de cette If you have any questions regarding this
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.
SPÉCIFICATION CEI
TECHNIQUE
IEC
TS 62370
TECHNICAL
Première édition
SPECIFICATION
First edition
2004-05
Electroacoustique –
Instruments pour la mesure
de l'intensité acoustique –
Exigences concernant les compatibilités
électromagnétiques et électrostatiques
et procédures d'essai
Electroacoustics –
Instruments for the measurement
of sound intensity –
Electromagnetic and electrostatic
compatibility requirements and
test procedures
 IEC 2004 Droits de reproduction réservés  Copyright - all rights reserved
Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any
utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including
électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from
microfilms, sans l'accord écrit de l'éditeur. the publisher.
International Electrotechnical Commission, 3, rue de Varembé, PO Box 131, CH-1211 Geneva 20, Switzerland
Telephone: [phone] Telefax: [phone] E-mail: [e-mail] Web: www.iec.ch
CODE PRIX
N
PRICE CODE
Commission Electrotechnique Internationale
International Electrotechnical Commission
МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue

– 2 – TS 62370  CEI:2004
SOMMAIRE
AVANT-PROPOS.4

1 Domaine d'application.8
2 Références normatives.8
3 Termes et définitions .10
4 Exigences concernant les compatibilités électromagnétiques et électrostatiques.10
4.1 Généralités.10
4.2 Limites concernant l'émission.12
4.3 Décharges électrostatiques.12
4.4 Immunité aux champs à la fréquence du secteur et à fréquence
radioélectrique ainsi qu'aux perturbations qui en découlent .14
5 Procédures d'essai.16
5.1 Généralités.16
5.2 Mesures concernant l'émission.16
5.3 Essais de décharge électrostatique .18
5.4 Essais concernant l'immunité aux champs à la fréquence du secteur et à
fréquence radioélectrique ainsi qu'aux perturbations qui en découlent.20
6 Renseignements devant être contenus dans la notice d'emploi.22

Annexe A (informative) Limites des émissions à fréquence radioélectrique .24

Bibliographie.26

TS 62370  IEC:2004 – 3 –
CONTENTS
FOREWORD.5

1 Scope.9
2 Normative references.9
3 Terms and definitions .11
4 Electromagnetic and electrostatic compatibility requirements .11
4.1 General.11
4.2 Emission limits.13
4.3 Electrostatic discharges.13
4.4 Immunity to power- and radio-frequency fields and conducted disturbances .15
5 Test procedures.17
5.1 General.17
5.2 Emission measurements.17
5.3 Tests for electrostatic discharge.19
5.4 Tests for immunity to power- and radio-frequency fields and conducted
disturbances.21
6 Information to be included in the instruction manual .23

Annex A (informative)  Radio-frequency emission limits .25

Bibliography.27

– 4 – TS 62370  CEI:2004
COMMISSION ÉLECTROTECHNIQUE INTERNATIONALE
____________
ÉLECTROACOUSTIQUE –
INSTRUMENTS POUR LA MESURE DE L'INTENSITÉ ACOUSTIQUE –
EXIGENCES CONCERNANT LES COMPATIBILITÉS
ÉLECTROMAGNÉTIQUES ET ÉLECTROSTATIQUES
ET PROCÉDURES D'ESSAI
AVANT-PROPOS
1) La Commission Electrotechnique Internationale (CEI) est une organisation mondiale de normalisation
composée de l'ensemble des comités électrotechniques nationaux (Comités nationaux de la CEI). La CEI a
pour objet de favoriser la coopération internationale pour toutes les questions de normalisation dans les
domaines de l'électricité et de l'électronique. A cet effet, la CEI – entre autres activités – publie des Normes
internationales, des Spécifications techniques, des Rapports techniques, des Spécifications accessibles au
public (PAS) et des Guides (ci-après dénommés "Publication(s) de la CEI"). Leur élaboration est confiée à des
comités d'études, aux travaux desquels tout Comité national intéressé par le sujet traité peut participer. Les
organisations internationales, gouvernementales et non gouvernementales, en liaison avec la CEI, participent
également aux travaux. La CEI collabore étroitement avec l'Organisation Internationale de Normalisation (ISO),
selon des conditions fixées par accord entre les deux organisations.
2) Les décisions ou accords officiels de la CEI concernant les questions techniques représentent, dans la mesure
du possible, un accord international sur les sujets étudiés, étant donné que les Comités nationaux de la CEI
intéressés sont représentés dans chaque comité d’études.
3) Les Publications de la CEI se présentent sous la forme de recommandations internationales et sont agréées
comme telles par les Comités nationaux de la CEI. Tous les efforts raisonnables sont entrepris afin que la CEI
s'assure de l'exactitude du contenu technique de ses publications; la CEI ne peut pas être tenue responsable
de l'éventuelle mauvaise utilisation ou interprétation qui en est faite par un quelconque utilisateur final.
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mesure possible, à appliquer de façon transparente les Publications de la CEI dans leurs publications
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toute autre Publication de la CEI, ou au crédit qui lui est accordé.
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référencées est obligatoire pour une application correcte de la présente publication.
9) L’attention est attirée sur le fait que certains des éléments de la présente Publication de la CEI peuvent faire
l’objet de droits de propriété intellectuelle ou de droits analogues. La CEI ne saurait être tenue pour
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La tâche principale des comités d’études de la CEI est l’élaboration des Normes
internationales. Exceptionnellement, un comité d’études peut proposer la publication d’une
spécification technique
• lorsqu’en dépit de maints efforts, l’accord requis ne peut être réalisé en faveur de la
publication d’une Norme internationale, ou
• lorsque le sujet en question est encore en cours de développement technique ou quand,
pour une raison quelconque, la possibilité d’un accord pour la publication d’une Norme
internationale peut être envisagée pour l’avenir mais pas dans l’immédiat.
Les spécifications techniques font l’objet d’un nouvel examen trois ans au plus tard après leur
publication afin de décider éventuellement de leur transformation en Normes internationales.
La CEI 62370 , qui est une spécification technique, a été établie par le comité d'études 29 de
la CEI: Electroacoustique.
TS 62370  IEC:2004 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
INSTRUMENTS FOR THE MEASUREMENT OF SOUND INTENSITY –
ELECTROMAGNETIC AND ELECTROSTATIC COMPATIBILITY
REQUIREMENTS AND TEST PROCEDURES

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
The main task of IEC technical committees is to prepare International Standards. In
exceptional circumstances, a technical committee may propose the publication of a technical
specification when
• the required support cannot be obtained for the publication of an International Standard,
despite repeated efforts, or
• the subject is still under technical development or where, for any other reason, there is the
future but no immediate possibility of an agreement on an International Standard.
Technical specifications are subject to review within three years of publication to decide
whether they can be transformed into International Standards.
IEC 62370, which is a technical specification, has been prepared by IEC technical committee
29: Electroacoustics.
– 6 – TS 62370  CEI:2004
Le texte de cette spécification technique est issu des documents suivants:
Projet d'enquête Rapport de vote
29/540/DTS 29/544A/RVC
Le rapport de vote indiqué dans le tableau ci-dessus donne toute information sur le vote ayant
abouti à l'approbation de cette spécification technique.
Cette publication a été rédigée selon les Directives ISO/CEI, Partie 2.
Le comité a décidé que le contenu de cette publication ne sera pas modifié avant 2006.
A cette date la publication sera
• reconduite;
• supprimée;
• remplacée par une édition révisée, ou
• amendée.
TS 62370  IEC:2004 – 7 –
The text of this technical specification is based on the following documents:
Enquiry draft Report on voting
29/540/DTS 29/544A/RVC
Full information on the voting for the approval of this technical specification can be found in
the report on voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
The committee has decided that the contents of this publication will remain unchanged until
2006. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 8 – TS 62370  CEI:2004
ÉLECTROACOUSTIQUE –
INSTRUMENTS POUR LA MESURE DE L'INTENSITÉ ACOUSTIQUE –
EXIGENCES CONCERNANT LES COMPATIBILITÉS
ÉLECTROMAGNÉTIQUES ET ÉLECTROSTATIQUES
ET PROCÉDURES D'ESSAI
1 Domaine d'application
1.1 La présente Spécification technique spécifie, pour les instruments qui mesurent
l'intensité acoustique au moyen d'une paire de microphones de pression, des exigences qui
sont en rapport avec leur immunité à des champs électriques à la fréquence du secteur ou à
fréquence radioélectrique, ainsi qu'à des décharges électrostatiques, ou avec les émissions à
fréquence radioélectrique tolérées, et décrit également les procédures d'essai destinées à
vérifier leur conformité à ces exigences. Les instruments de mesure de l'intensité acoustique
sont disponibles dans de nombreuses configurations différentes et peuvent être alimentés par
batteries ou par des sources d'alimentation extérieures. Les exigences techniques de la
présente Spécification technique s'appliquent à toutes les configurations d'instruments
destinés à la mesure de l'intensité acoustique.
1.2 Les exigences concernant les compatibilités électromagnétiques et électrostatiques
s'appliquent aux instruments de mesure de l'intensité acoustique utilisés aussi bien dans des
environnements résidentiels, commerciaux et d'industrie légère que dans des sites
industriels. Les exigences contenues dans la présente Spécification technique complètent
celles qui sont contenues dans la CEI 61043 et ne modifient aucune des spécifications qui y
sont incluses. Les exigences ne s'appliquent pas rétrospectivement aux instruments de
mesure de l'intensité acoustique satisfaisant à la CEI 61043 avant la publication de la
présente Spécification technique.
NOTE 1 La conformité à la présente Spécification technique ne garantit pas que le système de mesure de
l'intensité acoustique soit à l'abri des interférences provenant de toutes les sources électromagnétiques.
NOTE 2 Les présentes exigences constituent une première tentative pour spécifier des exigences concernant les
compatibilités électromagnétiques et électrostatiques relatives aux systèmes de mesure de l'intensité acoustique.
Elles pourront être modifiées ultérieurement en cas de nécessité lorsqu'on disposera de connaissances plus
complètes.
2 Références normatives
Les documents de référence suivants sont indispensables pour l'application du présent
document. Pour les références datées, seule l'édition citée s'applique. Pour les références
non datées, la dernière édition du document de référence s'applique (y compris les éventuels
amendements).
CEI 61000-4-2, Compatibilité électromagnétique (CEM) – Partie 4-2: Techniques d'essai et de
mesure – Section 2: Essai d'immunité aux décharges électrostatiques
CEI 61000-4-3:2002, Compatibilité électromagnétique (CEM) – Partie 4-3: Techniques d'essai
et de mesure – Essai d'immunité aux champs électromagnétiques rayonnés aux fréquences
radioélectriques
Amendement 1 (2002)
CEI 61000-6-1:1997, Compatibilité électromagnétique (CEM) – Partie 6: Normes génériques –
Section 1: Immunité pour les environnements résidentiels, commerciaux et de l'industrie
légère
CEI 61000-6-2:1999, Compatibilité électromagnétique (CEM) – Partie 6-2: Normes génériques
– Immunité pour les environnements industriels

TS 62370  IEC:2004 – 9 –
ELECTROACOUSTICS –
INSTRUMENTS FOR THE MEASUREMENT OF SOUND INTENSITY –
ELECTROMAGNETIC AND ELECTROSTATIC COMPATIBILITY
REQUIREMENTS AND TEST PROCEDURES

1 Scope
1.1 This Technical Specification specifies requirements for instruments that measure sound
intensity using pairs of pressure sensing microphones with respect to their immunity to power-
and radio-frequency fields and to electrostatic discharge, and the permitted radio-frequency
emissions, together with test procedures to verify conformance. Sound intensity measuring
instruments are available in many different configurations and may be powered by batteries or
from external power supply systems. The technical requirements in this Technical
Specification apply to all configurations of instruments for the measurement of sound
intensity.
1.2 The electromagnetic and electrostatic compatibility requirements are equally applicable
for sound intensity measuring instruments used in residential, commercial and light-industrial
environments, or industrial sites. The requirements of this Technical Specification are
additional to those contained in IEC 61043 and do not alter any of the specifications
contained therein. The requirements do not apply retrospectively to sound intensity measuring
instruments complying with IEC 61043 prior to the publication of this Technical Specification.
NOTE 1 Compliance with this Technical Specification does not insure that the sound intensity measuring system
is immune to interference from all electromagnetic sources.
NOTE 2 These requirements are the first attempt at defining electromagnetic and electrostatic compatibility
requirements for sound intensity measuring systems. Requirements can be changed later when wider experience
has been gained if found necessary.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 61000-4-2, Electromagnetic compatibility (EMC) – Part 4: Testing and measurement
techniques – Section 2: Electrostatic discharge immunity test
IEC 61000-4-3:2002, Electromagnetic compatibility (EMC) – Part 4-3: Testing and measure-
ment techniques – Radiated, radio-frequency, electromagnetic field immunity test
Amendment 1 (2002)
IEC 61000-6-1:1997, Electromagnetic compatibility (EMC) – Part 6: Generic standards –
Section 1: Immunity for residential, commercial and light-industrial environments
IEC 61000-6-2:1999, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –
Immunity for industrial environments

– 10 – TS 62370  CEI:2004
CISPR/CEI 61000-6-3:1996, Compatibilité électromagnétique (CEM) – Partie 6: Normes
génériques – Section 3: Norme sur l’émission pour les environnements résidentiels,
commerciaux et de l'industrie légère
CEI 61043, Electroacoustique – Instruments pour la mesure de l'intensité acoustique –
Mesure au moyen d'une paire de microphones de pression
CISPR 22:2003, Appareils de traitement de l'information – Caractéristiques des perturbations
radioélectriques – Limites et méthodes de mesure
3 Termes et définitions
Pour les besoins du présent document, les définitions suivantes s'appliquent en complément
de celles qui sont spécifiées dans la CEI 61000-4-2, la CEI 61000-4-3, la CEI 61000-6-1, la
CEI 61000-6-2 et la CISPR/CEI 61000-6-3.
3.1
orientation de référence (d'un système de mesure de l'intensité acoustique)
orientation d'un système de mesure de l'intensité acoustique par rapport à la direction
principale d'un émetteur ou d'un récepteur de champs à fréquence radioélectrique
3.2
système de mesure de l'intensité acoustique du groupe X
appareil constitué d'une unité indépendante qui comporte des possibilités de mesure de
l'intensité acoustique conformément à la présente Spécification technique, qui spécifie une
alimentation par batterie interne pour le mode normal de fonctionnement, et qui ne nécessite
aucune liaison externe à d'autres appareils pour son fonctionnement
3.3
système de mesure de l'intensité acoustique du groupe Y
appareil constitué d'une unité indépendante qui comporte des possibilités de mesure de
l'intensité acoustique conformément à la présente Spécification technique, qui spécifie une
alimentation par le secteur pour le mode normal de fonctionnement, et qui ne nécessite
aucune liaison externe à d'autres appareils pour son fonctionnement
3.4
système de mesure de l'intensité acoustique du groupe Z
appareil qui comporte des possibilités de mesure de l'intensité acoustique conformément à la
présente Spécification technique, qui nécessite en mode normal de fonctionnement
l'utilisation de deux ou de plusieurs éléments d'un système reliés entre eux sous une forme
quelconque, et qui est alimenté par batterie ou par le secteur
4 Exigences concernant les compatibilités électromagnétiques et
électrostatiques
4.1 Généralités
4.1.1 Le présent article spécifie, pour les systèmes de mesure de l'intensité acoustique, des
exigences relatives à leur immunité par rapport aux champs électromagnétique à la fréquence
du secteur et à fréquence radioélectrique et par rapport aux décharges électrostatiques ou
concernant les émissions à fréquence radioélectrique tolérées, et spécifie également,
conjointement avec l'Article 5, les procédures d'essai destinées à vérifier leur conformité avec
les exigences de la présente Spécification technique. Les systèmes de mesure de l'intensité
acoustique sont disponibles dans de nombreuses configurations différentes et peuvent être
alimentés par batteries ou par des sources d'alimentation extérieure.

TS 62370  IEC:2004 – 11 –
CISPR/IEC 61000-6-3:1996, Electromagnetic compatibility (EMC) – Part 6: Generic standards
– Section 3: Emission standard for residential, commercial and light-industrial environments
IEC 61043, Electroacoustics – Instruments for the measurement of sound intensity –
Measurement with pairs of pressure sensing microphones
CISPR 22:2003, Information technology equipment – Radio disturbance characteristics –
Limits and methods of measurement
3 Terms and definitions
For the purpose of this document, the following definitions apply in addition to those specified
in IEC 61000-4-2, IEC 61000-4-3, IEC 61000-6-1, IEC 61000-6-2 and CISPR 61000-6-3.
3.1
reference orientation (of a sound intensity measuring system)
orientation of a sound intensity measuring system with respect to the principal direction of an
emitter or receiver of radio frequency fields
3.2
group X sound intensity measuring system
self-contained instrument which includes sound intensity measuring facilities according to this
Technical Specification and which specifies internal battery power for the normal mode of
operation, requiring no external connections to other apparatus to operate the instrument
3.3
group Y sound intensity measuring system
self contained instrument which includes sound intensity measuring facilities according to this
Technical Specification and which specifies connection to a public power supply system for
the normal mode of operation, requiring no external connections to other apparatus to operate
the instrument.
3.4
group Z sound intensity measuring system
instrument that includes sound intensity measuring facilities according to this Technical
Specification requiring two or more items of equipment to be connected together by some
means for the normal mode of operation, with operation either from batteries or from a public
power supply
4 Electromagnetic and electrostatic compatibility requirements
4.1 General
4.1.1 This clause specifies requirements for sound intensity measuring systems with respect
to their immunity to power- and radio-frequency electromagnetic fields and to electrostatic
discharge, and the permitted radio-frequency emissions, together with Clause 5 which
specifies test procedures to demonstrate conformance to the specifications of this Technical
Specification. Sound intensity measuring systems are available in many different
configurations and may be powered by batteries or from external power supply systems.

– 12 – TS 62370  CEI:2004
Pour vérifier la conformité à ces exigences, il est nécessaire d'effectuer des essais conjoints sur
une sonde et un dispositif de calcul, et un tel système doit être spécifié avec tous les câbles et
tous les accessoires nécessaires. Les exigences techniques contenues dans cet article
concernent trois configurations de systèmes de mesure de l'intensité acoustique. Le premier
groupe, dénommé X, se rapporte à des appareils constitués d'une unité indépendante et qui sont
principalement conçus pour être alimentés par une batterie. Le second groupe, dénommé Y, se
rapporte à des appareils constitués d'une unité indépendante, qui comportent des possibilités de
mesure de l'intensité acoustique conformément à la présente Spécification technique et qui sont
alimentés par le secteur. Le troisième groupe, dénommé Z, se rapporte à des systèmes de
mesure de l'intensité acoustique qui sont constitués par l'interconnexion de deux ou de plusieurs
éléments d'un système (pour l'application des essais de compatibilité électromagnétique et
électrostatique, la sonde ne constitue pas un élément séparé du système).
4.1.2 Les exigences concernant les compatibilités électromagnétiques et électrostatiques
s'appliquent aux instruments de mesure de l'intensité acoustique utilisés dans aussi bien dans
des environnements résidentiels, commerciaux et d'industrie légère que dans des sites
industriels. Les exigences du présent article complètent celles qui sont contenues dans la
CEI 61043 et ne modifient aucune des spécifications concernant les systèmes de mesure de
l'intensité acoustique ou des éléments qui y sont inclus.
4.2 Limites concernant l'émission
4.2.1 Les limites supérieures des émissions à fréquence radioélectrique sont définies pour
tout type d'appareil par les limites indiquées dans le Tableau 1 de la CISPR 61000-6-3:1996,
qui constituent les exigences de base pour les systèmes de mesure de l'intensité acoustique
des groupes X, Y ou Z, et son compatibles avec de nombreuses normes. Ces exigences sont
résumées à l'Annexe A.
4.2.2 Les systèmes de mesure de l'intensité acoustique des groupes Y ou Z alimentés par le
secteur doivent également satisfaire aux limites concernant les perturbations apportées au
secteur et qui sont spécifiées dans la CISPR 22 pour les équipements de classe B. En ce qui
concerne les systèmes de mesure de l'intensité acoustique, les exigences sont résumées à
l'Annexe A.
4.2.3 La notice d'emploi doit indiquer la configuration, le mode de fonctionnement de
l'instrument et, le cas échéant, les dispositifs de connexion à l'instrument qui produisent les
plus fortes émissions à fréquence radioélectrique.
4.3 Décharges électrostatiques
4.3.1 Les systèmes de mesure de l'intensité acoustique des groupes X, Y ou Z doivent
supporter des décharges électrostatiques d'amplitudes spécifiées. Les exigences sont celles
qui sont spécifiées en 1.4 du Tableau 1 de la CEI 61000-6-1:1997 et qui sont résumées
comme suit:
– des décharges par contact jusqu'à 4 kV et des décharges dans l'air jusqu'à 8 kV avec des
tensions positives ou négatives, la polarité de la tension électrostatique étant relative à la
terre.
4.3.2 L’article 5 de la CEI 61000-6-1 spécifie le critère de fonctionnement B pendant et
après les essais de décharge électrostatique, de la façon suivante:
«A l'issue de l'essai, l'appareil doit continuer à fonctionner comme prévu. Aucune dégradation
du fonctionnement ou perte de fonctions n'est autorisée au-dessous du niveau d'aptitude
spécifié par le fabricant lorsque l'appareil est utilisé comme prévu. Le niveau d'aptitude peut
être remplacé par une perte d'aptitude admissible. Pendant l'essai, une dégradation du
fonctionnement est toutefois autorisée. Aucune modification du mode de fonctionnement en
cours ou des données mémorisées n'est autorisée. Si le niveau minimal d'aptitude ou la perte
d'aptitude admissible ne sont pas spécifiés par le constructeur, ils peuvent être déduits de la
description et de la documentation du produit et de ce que l'utilisateur est raisonnablement en
droit d'attendre de l'appareil s'il est utilisé comme prévu.»

TS 62370  IEC:2004 – 13 –
For conformance with these requirements, a probe and a processing system shall be tested
together, and the system this comprises shall be specified with all necessary cables and
accessories. The technical requirements in this clause are for three sound intensity measuring
system configurations: first, Group X, for self-contained instruments that are designed
primarily for battery operation; second, Group Y, for self-contained instruments that
incorporate sound intensity measuring facilities according to this Technical Specification and
that are operated from public power supply systems; third, Group Z, for sound intensity
measuring systems that are formed by interconnection of two or more items of equipment (for
the purposes of EMC testing, the probe is not a separate item of equipment).
4.1.2 The electromagnetic and electrostatic compatibility requirements are equally
applicable for sound intensity measuring systems used in residential, commercial and light-
industrial environments, or industrial sites. The requirements of this clause are additional to
those contained in IEC 61043 and do not alter any of the specifications for sound intensity
measuring systems or parts thereof contained therein.
4.2 Emission limits
4.2.1 The upper limits on radio-frequency emissions from any apparatus are defined for
compatibility with many different standards with the limits laid down in Table 1 of
CISPR 61000-6-3:1996, forming the basic requirements for sound intensity measuring
systems in groups X, Y or Z. These are summarized in Annex A.
4.2.2 Sound intensity measuring systems in groups Y or Z powered from a public power
supply system shall also comply with the limits for disturbance to the public supply system
specified in CISPR 22 for Class B equipment. For sound intensity measuring systems, the
requirements are summarized in Annex A.
4.2.3 The instruction manual shall state the configuration of, the mode of operation of, and the
connecting devices (if any) to, the instrument that produce the greatest radio-frequency
emissions.
4.3 Electrostatic discharges
4.3.1 Sound intensity measuring systems in groups X, Y or Z shall withstand electrostatic
discharges of specified magnitudes. The requirements are those specified in 1.4 of Table 1 in
IEC 61000-6-1:1997 and are summarized as follows:
– contact discharges up to 4 kV and air discharges up to 8 kV with both positive and
negative voltages. The polarity of the electrostatic voltage is with respect to earth ground.
4.3.2 Clause 5 of IEC 61000-6-1 specifies performance criterion B during and after
electrostatic discharge tests, given as follows:
"The apparatus shall continue to operate as intended after the test. No degradation of
performance or loss of function is allowed below a performance level specified by the
manufacturer, when the apparatus is used as intended. The performance level may be
replaced by a permissible loss of performance. During the test, degradation of performance is
however allowed. No change of actual operating state or stored data is allowed. If the
minimum performance level or the permissible performance loss is not specified by the
manufacturer, either of these may be derived from the product description and documentation
and what the user may reasonably expect from the apparatus if used as intended".

– 14 – TS 62370  CEI:2004
On entend par «appareil» tout système de mesure de l'intensité acoustique se conformant
aux exigences de la présente Spécification technique.
NOTE On pourrait admettre, comme exemple de dégradation de fonctionnement, que l'affichage sur l'appareil
devienne non lisible pendant l'application des décharges, mais redevienne complètement fonctionnel à l'issue de
l'application des décharges.
4.3.3 A la suite de chacun des essais complets de décharge électrostatique, le système de
mesure de l'intensité acoustique doit être totalement opérationnel et dans une configuration
identique à celle où il était avant le début des essais de décharge électrostatique. Les
données préalablement emmagasinées (s'il en existe) doivent rester inchangées.
4.4 Immunité aux champs à la fréquence du secteur et à fréquence radioélectrique
ainsi qu'aux perturbations qui en découlent
4.4.1 Les systèmes de mesure de l'intensité acoustique des groupes X, Y et Z doivent
présenter un degré minimal d'immunité dans certains domaines de fréquence du secteur et de
fréquences radioélectriques ainsi que dans certains domaines d'intensité du champ. Les
exigences sont celles qui sont spécifiées en 1.1 du Tableau 1 de la CEI 61000-6-1:1997 et en
1.2 du Tableau 1 de la CEI 61000-6-2:1999 avec des modifications mineures. Ces
modifications étendent la gamme de fréquences radioélectriques de façon à couvrir une
gamme de fréquences allant de 27 MHz à 1 000 MHz, et augmentent l'intensité du champ
électromagnétique à la fréquence du secteur à 80 A/m. Les exigences peuvent être résumées
comme suit:
– gamme des fréquences porteuses comprises entre 27 MHz et 1 000 MHz. Valeur efficace
de l'intensité du champ électrique jusqu'à 10 V/m (non modulé) inclus, avec une
modulation d'amplitude sinusoïdale de 80 % à 1 kHz,
– champ magnétique alternatif uniforme d'intensité efficace 80 A/m à 50 Hz ou 60 Hz.
4.4.2 Pour les systèmes de mesure de l'intensité acoustique des groupes Y ou Z qui sont
reliés au secteur, les appareils doivent également se conformer à des exigences
supplémentaires. Ces exigences sont données dans le Tableau 4 de la CEI 61000-6-2: 1999.
4.4.3 Pour les systèmes de mesure de l'intensité acoustique du groupe Z, et lorsque la
longueur des câbles d'interconnexion entre deux parties quelconques du système (à
l'exception de tout câble de liaison entre la sonde et le dispositif de calcul) dépasse 3 m, les
appareils doivent également se conformer aux exigences données dans le Tableau 2 de la
CEI 61000-6-2:1999.
4.4.4 Pour tous les groupes de systèmes de mesure de l'intensité acoustique, l'immunité de
tout appareil aux champs à la fréquence du secteur et à fréquence radioélectrique doit être
vérifiée en plaçant la sonde dans un champ acoustique connu tout en maintenant la sonde et
le calculateur dans un champ à la fréquence du secteur ou à fréquence radioélectrique quasi-
uniformes. Le champ acoustique doit consister en un son pur sinusoïdal de 925 Hz simulant
un champ acoustique d'un niveau d'intensité acoustique de 74 dB ± 0,5 dB et un champ
correspondant à une indication de "PI" (pressure intensity) égale à 5 dB. L’indicateur de PI
affiche la différence entre l'intensité acoustique et l'intensité sonore dans un champ
acoustique ambiant. Cette source peut être appliquée aux microphones pour autant que la
sensibilité de la sonde ou de la source aux émissions à la fréquence du secteur ou à
fréquence radioélectrique ne soit pas modifié. Le système de mesure de l'intensité acoustique
doit être placé dans l'orientation de référence par rapport à la source d'émission à fréquence
radioélectrique, comme spécifié dans la notice d'emploi. La sonde doit être placée près du
calculateur, conformément à l'orientation de référence, et monté à l'aide d'une entretoise dont
la longueur n'excède pas 25 mm. L'excédent de câble doit être replié sur lui-même en forme
de huit avec un nombre pair de boucles de longueur égale, généralement 250 mm, toutes les
boucles étant attachées ensemble à chacune de leurs extrémités et en leur centre.
NOTE On peut utiliser pour créer ce champ un tube d'ondes stationnaires non conducteur.

TS 62370  IEC:2004 – 15 –
The term “apparatus” means any sound intensity measuring system conforming t
...