Electroacoustics - Sound level meters - Part 1: Specifications

This part of IEC 61672 gives electroacoustical performance specifications for three kinds of sound measuring instruments: - a time-weighting sound level meter that measures exponential-time-weighted, frequencyweighted sound levels; - an integrating-averaging sound level meter that measures time-averaged, frequencyweighted sound levels; and - an integrating sound level meter that measures frequency-weighted sound exposure levels. Sound level meters conforming to the requirements of this standard have a specified frequency response for sound incident on the microphone from one principal direction in an acoustic free field or successively from random directions. Sound level meters specified in this standard are intended to measure sounds generally in the range of human hearing. NOTE The AU frequency weighting specified in IEC 61012 can be applied for measurements of A-weighted sound levels of audible sound in the presence of a source that contains spectral components at frequencies greater than 20 kHz. 1 Two performance categories, class 1 and class 2, are specified in this standard. In general, specifications for class 1 and class 2 sound level meters have the same design goals and differ mainly in the acceptance limits and the range of operational temperature. Acceptance limits for class 2 are greater than, or equal to, those for class 1. This standard is applicable to a range of designs for sound level meters. A sound level meter may be a self-contained hand-held instrument with an attached microphone and a built-in display device. A sound level meter may be comprised of separate components in one or more enclosures and may be capable of displaying a variety of acoustical signal levels. Sound level meters may include extensive analogue or digital signal processing, separately or in combination, with multiple analogue and digital outputs. Sound level meters may include general-purpose computers, recorders, printers, and other devices that form a necessary part of the complete instrument. Sound level meters may be designed for use with an operator present or for automatic and continuous measurements of sound level without an operator present. Specifications in this standard for the response to sound waves apply without an operator present in the sound field.

Elektroakustik - Schallpegelmesser - Teil 1: Anforderungen

Electroacoustique - Sonomètres - Partie 1: Spécifications

La CEI 61672-1:2013 donne des spécifications pour les caractéristiques électroacoustiques de trois types d'instruments de mesure acoustique: - les sonomètres avec pondération temporelle, qui mesurent les niveaux acoustiques avec une pondération fréquentielle et une pondération temporelle exponentielle; - les sonomètres intégrateurs-moyenneurs, qui mesurent les niveaux acoustiques moyens avec une pondération fréquentielle; et - les sonomètres intégrateurs, qui mesurent les niveaux d'exposition au bruit avec une pondération fréquentielle. Les sonomètres spécifiés dans la présente norme sont destinés à mesurer les bruits généralement dans la gamme des fréquences audibles. Deux catégories de performances, la classe 1 et la classe 2, sont spécifiées dans la présente norme. Les limites d'acceptation concernant la classe 2 sont supérieures ou égales à celles de la classe 1. La présente norme s'applique à une gamme de conceptions pour sonomètres. Un sonomètre peut être un appareil formant une unité indépendante tenue à la main comportant un microphone et un dispositif d'affichage incorporé. Un sonomètre peut être également composé de plusieurs composants séparés contenus dans un ou plusieurs boîtiers et être capable d'afficher une variété de niveaux de signaux acoustiques. Les sonomètres peuvent comporter des dispositifs étendus de traitement analogique ou numérique du signal, séparément ou en combinaison, avec de multiples sorties analogiques ou numériques. Les sonomètres peuvent comporter des ordinateurs d'usage général, des enregistreurs, des imprimantes et d'autres dispositifs qui constituent des parties essentielles de l'instrument complet. Les sonomètres peuvent être conçus pour être utilisés en présence d'un opérateur ou pour des mesures de niveau acoustique automatiques et continues sans la présence d'un opérateur. Les spécifications contenues dans la présente norme concernant la réponse à des ondes acoustiques s'appliquent sans la présence d'opérateur dans le champ acoustique. La présente seconde édition annule et remplace la première édition parue en 2002. Cette seconde édition constitue une révision technique dans laquelle la conformité aux spécifications est démontrée lorsque les écarts mesurés par rapport aux valeurs nominales ne dépassent pas les limites d'acceptation applicables, et lorsque l'incertitude de mesure ne dépasse pas l'incertitude maximale autorisée correspondante, les deux incertitudes étant déterminées pour une probabilité de couverture de 95 %.

Elektroakustika - Merilniki zvočne jakosti - 1. del: Specifikacije (IEC 61672-1:2013)

General Information

Status
Published
Publication Date
23-Jan-2014
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
13-Jan-2014
Due Date
20-Mar-2014
Completion Date
24-Jan-2014

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SLOVENSKI STANDARD
SIST EN 61672-1:2014
01-marec-2014
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SIST EN 61672-1:2004

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Electroacoustics - Sound level meters - Part 1: Specifications
Elektroakustik - Schallpegelmesser - Teil 1: Anforderungen
Electroacoustique - Sonomètres - Partie 1: Spécifications
Ta slovenski standard je istoveten z: EN 61672-1:2013
ICS:
17.140.50 Elektroakustika Electroacoustics
SIST EN 61672-1:2014 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN 61672-1:2014
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SIST EN 61672-1:2014
EUROPEAN STANDARD
EN 61672-1
NORME EUROPÉENNE
December 2013
EUROPÄISCHE NORM
ICS 17.140.50 Supersedes EN 61672-1:2003
English version
Electroacoustics -
Sound level meters -
Part 1: Specifications
(IEC 61672-1:2013)
Electroacoustique - Elektroakustik -
Sonomètres - Schallpegelmesser -
Partie 1: Spécifications Teil 1: Anforderungen
(CEI 61672-1:2013) (IEC 61672-1:2013)

This European Standard was approved by CENELEC on 2013-11-04. CENELEC members are bound to comply

with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard

the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on

application to the CEN-CENELEC Management Centre or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CENELEC member into its own language and notified

to the CEN-CENELEC Management Centre has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus,

the Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany,

Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland,

Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B - 1000 Brussels

© 2013 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 61672-1:2013 E
---------------------- Page: 3 ----------------------
SIST EN 61672-1:2014
EN 61672-1:2013 - 2 -
Foreword

The text of document 29/812/FDIS, future edition 2 of IEC 61672-1, prepared by IEC/TC 29

"Electroacoustics" in cooperation with the International Organization of Legal Metrology (OIML), was

submitted to the IEC-CENELEC parallel vote and approved by CENELEC as EN 61672-1:2013.

The following dates are fixed:
– latest date by which the document has to be implemented at (dop) 2013-08-04
national level by publication of an identical national
standard or by endorsement
– latest date by which the national standards conflicting with (dow) 2016-11-04
the document have to be withdrawn
This document supersedes EN 61672-1:2003.

EN 61672-1:2013 includes the following significant technical changes with respect to

EN 61672-1:2003.
In this second edition, conformance to specifications is demonstrated when

a) measured deviations from design goals do not exceed the applicable acceptance limits, and

b) the uncertainty of measurement does not exceed the corresponding maximum-permitted

uncertainty, with both uncertainties determined for a coverage probability of 95 %.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such

patent rights.
Endorsement notice

The text of the International Standard IEC 61672-1:2013 was approved by CENELEC as a European

Standard without any modification.
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SIST EN 61672-1:2014
- 3 - EN 61672-1:2013
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are

indispensable for its application. For dated references, only the edition cited applies. For undated

references, the latest edition of the referenced document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the

relevant EN/HD applies.
Publication Year Title EN/HD Year
IEC 60942 - Electroacoustics - Sound calibrators EN 60942 -
IEC 61000-4-2 2008 Electromagnetic compatibility (EMC) EN 61000-4-2 2009
Part 4-2: Testing and measurement
techniques - Electrostatic discharge
immunity test
IEC 61000-6-2 2005 Electromagnetic compatibility (EMC) EN 61000-6-2 2005
Part 6-2: Generic standards - Immunity for + corr. September 2005
industrial environments
IEC 61094-6 - Measurement microphones EN 61094-6 -
Part 6: Electrostatic actuators for
determination of frequency response
IEC 61183 - Electroacoustics - Random-incidence and EN 61183 -
diffuse-field calibration of sound level
meters
IEC 62585 - Electroacoustics - Methods to determine EN 62585 -
corrections to obtain the free-field
response of a sound level meter
ISO/IEC Guide 98-4 2012 Uncertainty of measurement - -
Part 4: Role of measurement uncertainty in
conformity assessment
ISO/IEC Guide 99 International vocabulary of metrology - - -
Basic and general concepts and
associated terms (VIM)
CISPR 16-1-1 2010 Specification for radio disturbance and EN 55016-1-1 2010
+ corr. October 2010 immunity measuring apparatus and - -
+ corr. October 2011 methods - -
+ A1 2010 Part 1-1: Radio disturbance and immunity + A1 2010
measuring apparatus - Measuring
apparatus
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SIST EN 61672-1:2014
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SIST EN 61672-1:2014
IEC 61672-1
Edition 2.0 2013-09
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Sound level meters –
Part 1: Specifications
Electroacoustique – Sonomètres –
Partie 1: Spécifications
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX XA
ICS 17.140.50 ISBN 978-2-8322-1087-1

Warning! Make sure that you obtained this publication from an authorized distributor.

Attention! Veuillez vous assurer que vous avez obtenu cette publication via un distributeur agréé.

® Registered trademark of the International Electrotechnical Commission
Marque déposée de la Commission Electrotechnique Internationale
---------------------- Page: 7 ----------------------
SIST EN 61672-1:2014
– 2 – 61672-1 © IEC:2013
CONTENTS

FOREWORD ........................................................................................................................... 4

INTRODUCTION ..................................................................................................................... 6

1 Scope ............................................................................................................................... 7

2 Normative references ....................................................................................................... 8

3 Terms and definitions ....................................................................................................... 8

4 Reference environmental conditions ............................................................................... 14

5 Performance specifications ............................................................................................. 14

5.1 General ................................................................................................................. 14

5.2 Adjustments at the calibration check frequency ..................................................... 17

5.3 Corrections to indicated levels ............................................................................... 17

5.3.1 General ..................................................................................................... 17

5.3.2 Reflections and diffraction ......................................................................... 17

5.3.3 Windscreens .............................................................................................. 18

5.3.4 Format for correction data ......................................................................... 18

5.3.5 Corrections for use during periodic testing ................................................. 19

5.4 Directional response .............................................................................................. 19

5.5 Frequency weightings ............................................................................................ 20

5.6 Level linearity ........................................................................................................ 23

5.7 Self-generated noise ............................................................................................. 24

5.8 Time-weightings F and S ....................................................................................... 24

5.9 Toneburst response ............................................................................................... 24

5.10 Response to repeated tonebursts .......................................................................... 26

5.11 Overload indication ............................................................................................... 27

5.12 Under-range indication .......................................................................................... 27

5.13 C-weighted peak sound level ................................................................................. 27

5.14 Stability during continuous operation ..................................................................... 28

5.15 High-level stability ................................................................................................. 28

5.16 Reset .................................................................................................................... 29

5.17 Thresholds ............................................................................................................ 29

5.18 Display .................................................................................................................. 29

5.19 Analogue or digital output ...................................................................................... 29

5.20 Timing facilities ..................................................................................................... 30

5.21 Radio frequency emissions and disturbances to a public power supply .................. 30

5.22 Crosstalk ............................................................................................................... 31

5.23 Power supply ......................................................................................................... 31

6 Environmental, electrostatic, and radio-frequency requirements ..................................... 32

6.1 General ................................................................................................................. 32

6.2 Static pressure ...................................................................................................... 32

6.3 Air temperature ..................................................................................................... 32

6.4 Humidity ................................................................................................................ 33

6.5 Electrostatic discharge .......................................................................................... 33

6.6 A.C. power-frequency and radio-frequency fields ................................................... 33

6.7 Mechanical vibration .............................................................................................. 34

7 Provision for use with auxiliary devices .......................................................................... 35

8 Marking .......................................................................................................................... 35

9 Instruction Manual .......................................................................................................... 35

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SIST EN 61672-1:2014
61672-1 © IEC:2013 – 3 –

9.1 General ................................................................................................................. 35

9.2 Information for operation ....................................................................................... 36

9.2.1 General ..................................................................................................... 36

9.2.2 Design features ......................................................................................... 36

9.2.3 Power supply ............................................................................................. 37

9.2.4 Adjustments at the calibration check frequency ......................................... 37

9.2.5 Corrections to indicated levels ................................................................... 37

9.2.6 Operating the sound level meter ................................................................ 37

9.2.7 Accessories ............................................................................................... 38

9.2.8 Influence of variations in environmental conditions .................................... 38

9.3 Information for testing ........................................................................................... 39

Annex A (informative) Relationship between tolerance interval, corresponding

acceptance interval and the maximum-permitted uncertainty of measurement ................ 41

Annex B (normative) Maximum-permitted uncertainties of measurement .............................. 42

Annex C (informative) Example assessments of conformance to specifications of this

standard ......................................................................................................................... 44

Annex D (normative) Frequencies at fractional-octave intervals ........................................... 47

Annex E (normative) Analytical expressions for frequency-weightings C, A, and Z ............... 49

Figure 1 – Principal steps involved in forming a time-weighted sound level ........................... 10

Figure A.1 – Relationship between tolerance interval, corresponding acceptance

interval and the maximum-permitted uncertainty of measurement ......................................... 41

Figure C.1 – Examples of assessment of conformance ......................................................... 46

Table 1 – Acceptance limits for the difference between a measured windscreen

correction and the corresponding correction given in the Instruction Manual ......................... 18

Table 2 – Acceptance limits for deviations of directional response from the design goal ....... 20

Table 3 – Frequency weightings and acceptance limits ......................................................... 22

Table 4 – Reference 4 kHz toneburst responses and acceptance limits ................................ 25

Table 5 – Reference differences for C-weighted peak sound levels and acceptance

limits ..................................................................................................................................... 28

Table 6 – Limits for conducted disturbance to the voltage of a public supply of electric

power ................................................................................................................................... 31

Table B.1 – Maximum-permitted uncertainties of measurement for a coverage

probability of 95 % ................................................................................................................ 42

Table C.1 – Examples of assessment of conformance .......................................................... 45

Table D.1 – Frequencies at one-third-octave intervals .......................................................... 47

Table D.2 – Frequencies at one-sixth-octave intervals .......................................................... 48

Table D.3 – Frequencies at one-twelfth-octave intervals ....................................................... 48

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SIST EN 61672-1:2014
– 4 – 61672-1 © IEC:2013
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
SOUND LEVEL METERS –
Part 1: Specifications
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.

International Standard IEC 61672-1 has been prepared by IEC technical committee 29,

Electroacoustics, in cooperation with the International Organization of Legal Metrology

(OIML).

This second edition cancels and replaces the first edition published in 2002. This second

edition constitutes a technical revision.
The main technical changes with respect to the previous edition are as follows:
In this second edition, conformance to specifications is demonstrated when:

a) measured deviations from design goals do not exceed the applicable acceptance limits,

and

b) the uncertainty of measurement does not exceed the corresponding maximum-permitted

uncertainty, with both uncertainties determined for a coverage probability of 95 %.

---------------------- Page: 10 ----------------------
SIST EN 61672-1:2014
61672-1 © IEC:2013 – 5 –

The text of this second edition is based on that of the first edition and the following

documents:
FDIS Report on voting
29/812/FDIS 29/823/RVD

Full information on the voting for the approval of this standard 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.

A list of all parts of the IEC 61672 series, published under the general title Electroacoustics –

Sound level meters, can be found on the IEC website.

The committee has decided that the contents of this publication will remain unchanged until

the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data

related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
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SIST EN 61672-1:2014
– 6 – 61672-1 © IEC:2013
INTRODUCTION

For assessments of conformance to performance specifications, this second edition of

IEC 61672-1 uses different criteria than were used for the 2002 first edition.

In the period from 1961 to 1985, International Standards for sound level meters did not

provide any requirements or recommendations to account for the uncertainty of measurement

in assessments of conformance to specifications.

This absence of requirements or recommendations to account for uncertainty of measurement

created ambiguity in determinations of conformance to specifications for situations where a

measured deviation from a design goal was close to a limit of the allowed deviation. If

conformance was determined based on whether a measured deviation did or did not exceed

the limits, the end-user of the sound level meter incurred the risk that the true deviation from

a design goal exceeded the limits.

To remove this ambiguity, IEC Technical Committee 29, at its meeting in 1996, adopted a

policy to account for measurement uncertainty in assessments of conformance in International

Standards that it prepares.

The first edition (2002) of IEC 61672-1 accounted for measurement uncertainty by giving two

explicit criteria for determining conformance to the specifications. The two criteria were (a)

that measured deviations from design goals, extended by the expanded uncertainty of

measurement, do not exceed the applicable tolerance limits and (b) that the expanded

uncertainty of measurement does not exceed agreed-upon maximum values. For most

performance specifications, the tolerance limits were calculated essentially by extending the

allowances for design and manufacturing from the 1979 and 1985 International Standards for

sound level meters by the applicable maximum-permitted expanded uncertainties of

measurement. Tolerance limits were intended to represent the limits for true deviations from

design goals with a coverage probability of 95 %.

This second edition of IEC 61672-1 uses an amended criterion for assessing conformance to

a specification. Conformance is demonstrated when (a) measured deviations from design

goals do not exceed the applicable acceptance limits and (b) the uncertainty of measurement

does not exceed the corresponding maximum-permitted uncertainty. Acceptance limits are

analogous to the allowances for design and manufacturing implied in the first edition (2002) of

IEC 61672-1. Actual and maximum-permitted uncertainties are determined for a coverage

probability of 95 %. The amended criterion for assessing conformance does not necessitate

any change to the design of a sound level meter in order to conform to the specifications of

this International Standard.

The maximum-permitted uncertainties of measurement are not equivalent to the uncertainties

associated with the measurement of a sound level. The uncertainty of a measured sound level

is evaluated from the anticipated deviations of the electroacoustical performance of the sound

level meter from the relevant design goals as well as estimates of the uncertainties

associated with the specific measurement situation. Unless more-specific information is

available, the evaluation of the contribution of a specific sound level meter to a total

measurement uncertainty can be based on the acceptance limits and maximum-permitted

uncertainties specified in this standard.
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SIST EN 61672-1:2014
61672-1 © IEC:2013 – 7 –
ELECTROACOUSTICS –
SOUND LEVEL METERS –
Part 1: Specifications
1 Scope

This part of IEC 61672 gives electroacoustical performance specifications for three kinds of

sound measuring instruments:

• a time-weighting sound level meter that measures exponential-time-weighted, frequency-

weighted sound levels;

• an integrating-averaging sound level meter that measures time-averaged, frequency-

weighted sound levels; and

• an integrating sound level meter that measures frequency-weighted sound exposure

levels.

Sound level meters conforming to the requirements of this standard have a specified

frequency response for sound incident on the microphone from one principal direction in an

acoustic free field or successively from random directions.

Sound level meters specified in this standard are intended to measure sounds generally in the

range of human hearing.

NOTE The AU frequency weighting specified in IEC 61012 can be applied for measurements of A-weighted sound

levels of audible sound in the presence of a source that contains spectral components at frequencies greater than

20 kHz.

Two performance categories, class 1 and class 2, are specified in this standard. In general,

specifications for class 1 and class 2 sound level meters have the same design goals and

differ mainly in the acceptance limits and the range of operational temperature. Acceptance

limits for class 2 are greater than, or equal to, those for class 1.

This standard is applicable to a range of designs for sound level meters. A sound level meter

may be a self-contained hand-held instrument with an attached microphone and a built-in

display device. A sound level meter may be comprised of separate components in one or

more enclosures and may be capable of displaying a variety of acoustical signal levels. Sound

level meters may include extensive analogue or digital signal processing, separately or in

combination, with multiple analogue and digital outputs. Sound level meters may include

general-purpose computers, recorders, printers, and other devices that form a necessary part

of the complete instrument.

Sound level meters may be designed for use with an operator present or for automatic and

continuous measurements of sound level without an operator present. Specifications in this

standard for the response to sound waves apply without an operator present in the sound

field.
___________

IEC 61012, Filters for the measurement of audible sound in the presence of ultrasound.

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SIST EN 61672-1:2014
– 8 – 61672-1 © IEC:2013
2 Normative references

The following documents, in whole or in part, are normatively referenced in this document and

are indispensable for its application. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any
amendments) applies.
IEC 60942, Electroacoustics – Sound calibrators
IEC 61000-4-2:2008, Electromagnetic compatibility (EMC) – Part 4-2: Testing and
measurement techniques – Electrostatic discharge immunity test

IEC 61000-6-2:2005, Electromagnetic compatibility (EMC) – Part 6-2: Generic standards –

Immunity for industrial environments

IEC 61094-6, Measurement microphones – Part 6: Electrostatic actuators for determination of

frequency response

IEC 61183, Electroacoustics – Random-incidence and diffuse-field calibration of sound level

meters

IEC 62585, Electroacoustics – Methods to determine corrections to obtain the free-field

response of a sound level meter

ISO/IEC Guide 98-4:2012, Evaluation of measurement data – The role of measurement

uncertainty in conformance assessment

ISO/IEC Guide 99, International vocabulary of metrology – Basic and general concepts and

associated terms (VIM)

CISPR 16-1-1:2010, Specification for radio disturbance and immunity measuring apparatus

and methods – Part 1-1: Radio disturbance and immunity measuri
...

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