Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1: Methods of measuring and specifying the performance of system components

Akustik - Audiofrequenz-Induktionsschleifenanlagen zur Unterstützung von Hörsystemen - Teil 1: Verfahren zur Messung und Angabe des Betriebsverhaltens der Systemkomponenten

Electroacoustique - Systèmes de boucles d'induction audiofréquences pour améliorer l'audition - Partie 1: Méthodes de mesure et de spécification des performances des composants de systèmes

Elektroakustika - Sistemi z avdiofrekvenčno indukcijsko zanko za slušne pripomočke - 1. del: Metode za merjenje in specificiranje lastnosti sistemskih komponent - Dopolnilo A1

General Information

Status
Published
Publication Date
12-Feb-2015
Technical Committee
Drafting Committee
Current Stage
6060 - Document made available
Due Date
13-Feb-2015
Completion Date
13-Feb-2015

RELATIONS

Buy Standard

Amendment
EN 62489-1:2010/A1:2015 - BARVE na PDF-strani 16
English language
15 pages
sale 10% off
Preview
sale 10% off
Preview

e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 62489-1:2010/A1:2015
01-september-2015
(OHNWURDNXVWLND6LVWHPL]DYGLRIUHNYHQþQRLQGXNFLMVNR]DQNR]DVOXãQH
SULSRPRþNHGHO0HWRGH]DPHUMHQMHLQVSHFLILFLUDQMHODVWQRVWLVLVWHPVNLK
NRPSRQHQW'RSROQLOR$

Electroacoustics - Audio-frequency induction loop systems for assisted hearing - Part 1:

Methods of measuring and specifying the performance of system components

Akustik - Audiofrequenz-Induktionsschleifenanlagen zur Unterstützung von Hörsystemen

- Teil 1: Verfahren zur Messung und Angabe des Betriebsverhaltens der
Systemkomponenten

Electroacoustique - Systèmes de boucles d'induction audiofréquences pour améliorer

l'audition - Partie 1: Méthodes de mesure et de spécification des performances des

composants de systèmes
Ta slovenski standard je istoveten z: EN 62489-1:2010/A1:2015
ICS:
11.180.15 3ULSRPRþNL]DJOXKHRVHEHLQ Aids for deaf and hearing
RVHEH]RNYDURVOXKD impaired people
17.140.50 Elektroakustika Electroacoustics
SIST EN 62489-1:2010/A1:2015 en

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

---------------------- Page: 1 ----------------------
SIST EN 62489-1:2010/A1:2015
---------------------- Page: 2 ----------------------
SIST EN 62489-1:2010/A1:2015
EUROPEAN STANDARD EN 62489-1:2010/A1
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 17.140.50
English Version
Electroacoustics - Audio-frequency induction loop systems for
assisted hearing - Part 1: Methods of measuring and specifying
the performance of system components
(IEC 62489-1:2010/A1:2014)

Electroacoustique - Systèmes de boucles d'induction Akustik - Audiofrequenz-Induktionsschleifenanlagen zur

audiofréquences pour améliorer l'audition - Partie 1: Unterstützung von Hörsystemen - Teil 1: Verfahren zur

Méthodes de mesure et de spécification des performances Messung und Angabe des Betriebsverhaltens der

des composants de systèmes Systemkomponenten
(IEC 62489-1:2010/A1:2014) (IEC 62489-1:2010/A1:2014)

This amendment A1 modifies the European Standard EN 62489-1:2010; it was approved by CENELEC on 2015-01-21. CENELEC

members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this amendment 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 amendment 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.
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

© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.

Ref. No. EN 62489-1:2010/A1:2015 E
---------------------- Page: 3 ----------------------
SIST EN 62489-1:2010/A1:2015
EN 62489-1:2010/A1:2015 - 2 -
Foreword

The text of document 29/853/FDIS, future IEC 62489-1:2010/A1, prepared by IEC TC 29,

Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as

EN 62489-1:2010/A1:2015.
The following dates are fixed:
(dop) 2015-10-21
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-01-21
• latest date by which the national
standards conflicting with the
document have to be withdrawn

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 62489-1:2010/A1:2014 was approved by CENELEC as a

European Standard without any modification.
---------------------- Page: 4 ----------------------
SIST EN 62489-1:2010/A1:2015
- 3 - EN 62489-1:2010/A1:2015
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 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.

NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:

www.cenelec.eu.
Publication Year Title EN/HD Year
Replace IEC60268-3:2000 by the following reference:
IEC 60268-3 2013 Sound system equipment -- EN 60268-3 2013
Part 3: Amplifiers
Add to Annex ZA of EN 62489-1:2010 the following new references:
IEC 60417 - Graphical symbols for use on equipment. HD 243 S12 -
Index, survey and compilation of the single
sheets.
IEC 60603-11 - Connectors for frequencies below 3 MHz for - -
use with printed boards --
Part 11: Detail specification for concentric
connectors (dimensions for free connectors
and fixed connectors)
---------------------- Page: 5 ----------------------
SIST EN 62489-1:2010/A1:2015
---------------------- Page: 6 ----------------------
SIST EN 62489-1:2010/A1:2015
IEC 62489-1
Edition 1.0 2014-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
AM ENDMENT 1
AM ENDEMENT 1
Electroacoustics – Audio-frequency induction loop systems for assisted
hearing –
Part 1: Methods of measuring and specifying the performance of system
components
Électroacoustique – Systèmes de boucles d’induction audiofréquences pour
améliorer l'audition –
Partie 1: Méthodes de mesure et de spécification des performances des
composants de systèmes
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX
ICS 17.140.50 ISBN 978-2-8322-1957-7

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 62489-1:2010/A1:2015
– 2 – IEC 62489-1:2010/AMD1:2014
© IEC 2014
FOREWORD

This amendment has been prepared by IEC technical committee 29: Electroacoustics.

The text of this amendment is based on the following documents:
FDIS Report on voting
29/853/FDIS 29/860/RVD

Full information on the voting for the approval of this amendment can be found in the report

on voting indicated in the above table.

The committee has decided that the contents of this amendment and the base 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.

IMPORTANT – The 'colour inside' logo on the cover page of this publication indicates

that it contains colours which are considered to be useful for the correct

understanding of its contents. Users should therefore print this document using a

colour printer.
_____________
CONTENTS
Add the titles of the new Clauses 9 and 10 and their subclauses as follows:
9 Neck loops
9.1 Input voltage
9.1.1 Characteristic to be specified
9.1.2 Method of measurement
9.2 Input impedance
9.2.1 Characteristic to be specified
9.2.2 Method of measurement
9.2.3 Recommended values
9.3 Frequency response
9.3.1 Characteristic to be specified
9.3.2 Method of measurement
9.3.3 Presentation of results
9.3.4 Connector
10 Monitoring devices
10.1 General
10.2 Recommendations for fixed devices
10.3 Recommendations for portable devices
Add the titles of the new Annexes D, E and F as follows.
---------------------- Page: 8 ----------------------
SIST EN 62489-1:2010/A1:2015
IEC 62489-1:2010/AMD1:2014 – 3 –
© IEC 2014
Annex D (informative) Neck loops
Annex E (normative) Test jig for measuring the performance of neck loops

Annex F(normative) Specifications for loop listeners and assistive listening devices (ALDs)

Add, in the list of figures, the titles of new Figures E.1, E.2, E.3, E.4 and F.1 as follows.

Figure E.1 – Side view
Figure E.2 – Front view
Figure E.3 – Back view
Figure E.4 – Arrangement of the neck loop on the jig
Figure F.1 – Target frequency response
Add, in the list of tables, the title of the new Table 1, as follows.
Table 1 – Types of fixed monitoring device
2 Normative references
Add the following new references:

IEC 60417, Graphical symbols for use on equipment (available at http://www.graphical-

symbols.info/equipment)

IEC 60603-11, Connectors for frequencies below 3 MHz for use with printed boards – Part 11:

Detail specification for concentric connectors (dimensions for free connectors and fixed

connectors)

Replace the reference to "IEC 60268-3:2000", with the following updated reference:

IEC 60268-3:2013, Sound system equipment – Part 3: Amplifiers
3 Terms and definitions
Add, after 3.1 the following new terms and definitions:
3.2
phased loop array

system of neighbouring loops in which the currents are not in phase with each other

3.3
neck loop
small induction loop intended to be worn around the neck
NOTE See Annex D.
3.4
telecoil

magnetic pickup coil intended to receive signals from an induction-loop system in accordance

with IEC 60118-4

NOTE A telecoil can be part of a hearing aid or of any other device for receiving signals for an induction-loop

system in accordance with IEC 60118-4.
---------------------- Page: 9 ----------------------
SIST EN 62489-1:2010/A1:2015
– 4 – IEC 62489-1:2010/AMD1:2014
© IEC 2014
3.5
loop listener

system consisting of a portable amplifier incorporating a telecoil and headphones or

earphones, intended to receive signals from an induction-loop system in accordance with

IEC 60118-4

NOTE The functions of loop listener and assistive listening device (see 3.6) can be combined.

3.6
assistive listening device
ALD

system consisting of a microphone, a portable amplifier and headphones, earphone or a neck

loop

NOTE 1 This device is not the portable receiver described in Annex E of IEC 60118-4:2006, which includes

measurement of magnetic field strength but no compensation for frequency-dependent hearing loss and AGC.

NOTE 2 This note applies to the French language only.
5.1 General

Replace, in the Note, the reference to IEC 60268-3:2000 with the updated reference to

IEC 606268-3:2013 as follows:

NOTE For characteristics not mentioned in this standard, the provisions of IEC 60268-3 can be applied, with the

provisions of 5.2 of this standard replacing those of 3.1 of IEC 60268-3:2013.
Add, after 5.4.13.3, the following new subclause:
5.4.13.4 Recommendations

It is strongly recommended that the amplifier should include automatic gain control with an

input level range of at least 32 dB for a maximum output level change of 3 dB. The total

harmonic distortion plus noise of the output current over this range should not exceed 5 %.

5.4.14 Phase error of quadrature networks for phased loop arrays
Replace all the existing subclauses by the following new subclauses:
5.4.14.1 Explanation

The primary means of reducing the overspill of the magnetic field of an AFILS to places where

it is not wanted is to reduce loop dimensions. If two or more adjacent small loops are

operated simultaneously in order to increase the useful magnetic field volume, the magnetic

fields partially or completely cancel in some places, creating unacceptable 'nulls', unless the

identical currents in the loops are decorrelated (forced to be 'out of step'). This can be

achieved in two ways:
• by delaying the current in one loop with respect to the other;

• by shifting the phase of the current in one loop by approximately 90° with respect to the

other.

The latter method is more commonly used. The phase difference needs to be near (but not

very precisely) 90°. The two fields create a rotating field (direction) vector, whose tip

describes a circle if the two fields are equal and at 90°. If not, it describes an ellipse, so that

the combined field is more irregular in space. If the two fields are not at 90° phase, one can

be considered as having a reference phase angle of 0°, the other having a relative phase

angle X. This field can be resolved into an in-phase component cos X and a quadrature

component sin X. The interaction of the in-phase component and the reference field tends to

produce the nulls in the vertical component of the field that would happen with no phase

difference. However, for small deviations from 90°, the effect is minimal. For example,

---------------------- Page: 10 ----------------------
SIST EN 62489-1:2010/A1:2015
IEC 62489-1:2010/AMD1:2014 – 5 –
© IEC 2014

cos 85° = 0,087, so the in-phase field is increased or decreased by 0,72 dB, depending on

where the measurement is taken; in some places the fields add; in others they subtract.

5.4.14.2 Characteristic to be specified

The maximum deviation from 90° of the phase angle between the loop currents over the

frequency range 100 Hz to 5 kHz.
5.4.14.3 Method of measurement

See 14.11.4 of IEC 60268-3:2013. The loop currents may be measured by including a very

low value resistor in series with each loop and measuring the voltage across it. A 2-channel

audio analyser with balanced inputs may be used, or an oscilloscope. Because neither end of

the resistor is likely to be at earth potential, a simple balanced follower may be included

between the resistor and the input of the oscilloscope.
5.4.14.4 Presentation of results

The maximum deviation in degrees and the associated frequency or frequencies shall be

stated.
Insert, after Clause 6, the following new
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.