Acoustics - Reference zero for the calibration of audiometric equipment - Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones (ISO 389-1:2017)

ISO 389-1:2017 specifies a standard reference zero for the scale of hearing threshold level applicable to pure-tone air conduction audiometers, to promote agreement and uniformity in the expression of hearing threshold level measurements throughout the world.
ISO 389-1:2017 states the information in a form suitable for direct application to the calibration of audiometers, that is, in terms of the reference equivalent threshold sound pressure levels of generic supra-aural earphones specified in 4.2, measured on an ear simulator complying with IEC 60318‑1 and in terms of model-specific data given in two additional tables for the IEC 60318‑3 acoustic coupler and the IEC 60318‑1 ear simulator, respectively.
The data are based on an assessment of the information available from the various standardizing laboratories responsible for audiometric standards and from scientific publications.
Some notes on the application and derivation of the reference levels are given in Annexes A and B.

Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 1: Äquivalente Bezugs-Schwellenschalldruckpegel für reine Töne und supra-aurale Kopfhörer (ISO 389-1:2017)

Dieser Teil von ISO 389 legt einen Standard-Bezugspegel für die Hörschwellenpegel-Skala von Reinton-Luftleitungs-Audiometern fest, um die weltweite Übereinstimmung und Einheitlichkeit in der Angabe der Ergebnisse von Hörschwellenpegel-Messungen zu fördern.
Er gibt die Daten in einer solchen Weise an, dass sie bei der Kalibrierung von Audiometern unmittelbar angewendet werden können, d. h. in Form der äquivalenten Bezugs-Schwellenschalldruckpegel von in 4.2 festgelegten allgemeinen supra-auralen Kopfhörern, die an einem Ohrsimulator nach IEC 60318-1 und in Form von bauartspezifischen Daten gemessen wurden, welche in zwei zusätzlichen Tabellen für IEC 60318 1 für Ohrsimulatoren beziehungsweise IEC 60318-3 für akustische Kuppler angeben sind.
Die Daten beruhen auf den verfügbaren Angaben verschiedener Normungslaboratorien, die für die audio-metrische Normung verantwortlich sind, und auf wissenschaftlichen Veröffentlichungen.
Einige Anmerkungen zur Ableitung und Anwendung der Bezugspegel sind in Anhang B angegeben.

Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie 1: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs à sons purs supra-auraux (ISO 389-1:2017)

ISO 389-1:2017 spécifie un zéro normal de référence pour l'échelle des niveaux liminaires d'audition, applicable aux audiomètres à sons purs en conduction aérienne, afin de favoriser, au niveau mondial, la concordance et l'uniformité d'expression des mesurages des niveaux liminaires d'audition.
ISO 389-1:2017 expose les données sous une forme se prêtant à leur application directe pour l'étalonnage des audiomètres, c'est-à-dire en termes de niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs supra-auraux génériques spécifiés en 4.2, mesurés au moyen d'un simulateur d'oreille conforme à l'IEC 60318-1, et en termes de données spécifiques fournies dans deux tableaux supplémentaires, correspondant respectivement au coupleur acoustique de l'IEC 60318-3 et au simulateur d'oreille de l'IEC 60318-1.
Ces données s'appuient sur une évaluation des informations provenant de divers laboratoires de normalisation responsables de l'élaboration de normes audiométriques, ainsi que de publications scientifiques.
Quelques observations portant sur l'application et l'obtention des niveaux de référence figurent aux Annexes A et B.

Akustika - Referenčna ničla za umerjanje avdiometrov - 1. del: Referenčni ekvivalentni prag ravni zvočnega tlaka za čiste tone in delne (supraauralne) naušnike (ISO 389-1:2017)

Ta dokument določa standardno referenčno ničlo za obseg ravni zvočnega tlaka, ki se uporablja za avdiometre čistega tona z namenom dogovarjanja in enotnosti pri izražanju meritev ravni zvočnega tlaka na svetovni ravni.
Navaja informacije v obliki, ki je primerna za neposredno uporabo pri umerjanju avdiometrov, to je v smislu referenčne mejne ravni zvočnega tlaka generičnih delnih naušnikov iz točke 4.2, izmerjene s simulatorjem za uho v skladu s standardom IEC 60318-1, in v smislu podatkov za posamezne modele, podanih v dveh dodatnih preglednicah za akustično spojko iz standarda IEC 60318-3 in simulatorja za uho iz standarda IEC 60318-1.
Podatki temeljijo na oceni razpoložljivih informacij iz različnih standardizacijskih laboratorijev, pristojnih za avdiometrične standarde, in iz znanstvenih publikacij.
Nekatera pojasnila o uporabi in izpeljavi referenčnih ravni so podana v dodatkih A in B.

General Information

Status
Published
Publication Date
13-Feb-2018
Technical Committee
Drafting Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
14-Feb-2018
Completion Date
14-Feb-2018

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SLOVENSKI STANDARD
SIST EN ISO 389-1:2018
01-april-2018
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SIST EN ISO 389-1:2001
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Acoustics - Reference zero for the calibration of audiometric equipment - Part 1:

Reference equivalent threshold sound pressure levels for pure tones and supra-aural

earphones (ISO 389-1:2017)

Akustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 1:

Äquivalente Bezugs-Schwellenschalldruckpegel für reine Töne und supra-aurale
Kopfhörer (ISO 389-1:2017)

Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie

1: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs

à sons purs supra-auraux (ISO 389-1:2017)
Ta slovenski standard je istoveten z: EN ISO 389-1:2018
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
17.140.01 $NXVWLþQDPHUMHQMDLQ Acoustic measurements and
EODåHQMHKUXSDQDVSORãQR noise abatement in general
SIST EN ISO 389-1:2018 en

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

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SIST EN ISO 389-1:2018
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SIST EN ISO 389-1:2018
EN ISO 389-1
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2018
EUROPÄISCHE NORM
ICS 13.140 Supersedes EN ISO 389-1:2000
English Version
Acoustics - Reference zero for the calibration of
audiometric equipment - Part 1: Reference equivalent
threshold sound pressure levels for pure tones and supra-
aural earphones (ISO 389-1:2017)

Acoustique - Zéro de référence pour l'étalonnage Akustik - Standard-Bezugspegel für die Kalibrierung

d'équipements audiométriques - Partie 1: Niveaux de audiometrischer Geräte - Teil 1: Äquivalente Bezugs-

référence équivalents de pression acoustique liminaire Schwellenschalldruckpegel für reine Töne und supra-

pour les écouteurs à sons purs supra-auraux (ISO 389- aurale Kopfhörer (ISO 389-1:2017)

1:2017)
This European Standard was approved by CEN on 16 December 2017.

CEN 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 CEN

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 CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 389-1:2018 E

worldwide for CEN national Members.
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SIST EN ISO 389-1:2018
EN ISO 389-1:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 3

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SIST EN ISO 389-1:2018
EN ISO 389-1:2018 (E)
European foreword

This document (EN ISO 389-1:2018) has been prepared by Technical Committee ISO/TC 43 “Acoustics”

in collaboration with Technical Committee CEN/TC 211 “Acoustics” the secretariat of which is held by

DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by August 2018, and conflicting national standards shall

be withdrawn at the latest by August 2018.

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

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN ISO 389-1:2000.

According to the CEN-CENELEC Internal Regulations, the national standards organisations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,

Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,

France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,

Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and the United Kingdom.
Endorsement notice

The text of ISO 389-1:2017 has been approved by CEN as EN ISO 389-1:2018 without any modification.

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SIST EN ISO 389-1:2018
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SIST EN ISO 389-1:2018
INTERNATIONAL ISO
STANDARD 389-1
Second edition
2017-12
Acoustics — Reference zero for
the calibration of audiometric
equipment —
Part 1:
Reference equivalent threshold sound
pressure levels for pure tones and
supra-aural earphones
Acoustique — Zéro de référence pour l'étalonnage d'équipements
audiométriques —
Partie 1: Niveaux de référence équivalents de pression acoustique
liminaire pour les écouteurs à sons purs supra-auraux
Reference number
ISO 389-1:2017(E)
ISO 2017
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SIST EN ISO 389-1:2018
ISO 389-1:2017(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2017, Published in Switzerland

All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form

or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior

written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of

the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. +41 22 749 01 11
Fax +41 22 749 09 47
copyright@iso.org
www.iso.org
ii © ISO 2017 – All rights reserved
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SIST EN ISO 389-1:2018
ISO 389-1:2017(E)
Contents Page

Foreword ........................................................................................................................................................................................................................................iv

Introduction ..................................................................................................................................................................................................................................v

1 Scope ................................................................................................................................................................................................................................. 1

2 Normative references ...................................................................................................................................................................................... 1

3 Terms and definitions ..................................................................................................................................................................................... 1

4 Specifications ........................................................................................................................................................................................................... 2

4.1 General ........................................................................................................................................................................................................... 2

4.2 Generic supra-aural earphones in conjunction with an IEC 60318-1 ear simulator ................. 3

4.3 Model-specific earphones in conjunction with an IEC 60318-1 ear simulator ............................... 4

4.4 Model-specific earphones in conjunction with an IEC 60318-3 acoustic coupler ....................... 5

Annex A (informative) Application of the RETSPLs ............................................................................................................................... 7

Annex B (informative) Notes on the derivation of the RETSPLs ............................................................................................... 8

Bibliography .............................................................................................................................................................................................................................10

© ISO 2017 – All rights reserved iii
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SIST EN ISO 389-1:2018
ISO 389-1:2017(E)
Foreword

ISO (the International Organization for Standardization) is a worldwide federation of national standards

bodies (ISO member bodies). The work of preparing International Standards is normally carried out

through ISO technical committees. Each member body interested in a subject for which a technical

committee has been established has the right to be represented on that committee. International

organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.

ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of

electrotechnical standardization.

The procedures used to develop this document and those intended for its further maintenance are

described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the

different types of ISO documents should be noted. This document was drafted in accordance with the

editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).

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

patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of

any patent rights identified during the development of the document will be in the Introduction and/or

on the ISO list of patent declarations received (see www.iso.org/patents).

Any trade name used in this document is information given for the convenience of users and does not

constitute an endorsement.

For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and

expressions related to conformity assessment, as well as information about ISO's adherence to the

World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following

URL: www.iso.org/iso/foreword.html.
The committee responsible for this document is ISO/TC 43, Acoustics.

This second edition cancels and replaces the first edition (ISO 389-1:1998), which has been technically

revised.
The main changes compared to the previous edition are as follows:
— data for additional models of earphone have been introduced;

— wording and definitions have been aligned with the current versions of standards in the field of

audiology.

A current list of all parts in the ISO 389 series can be found on the ISO website.

iv © ISO 2017 – All rights reserved
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SIST EN ISO 389-1:2018
ISO 389-1:2017(E)
Introduction

Each document in the ISO 389 series specifies reference threshold levels for the calibration of

audiometric equipment. This document is applicable to equipment for pure-tone air-conduction

audiometry that uses supra-aural earphones.

In principle, reference equivalent threshold sound pressure levels (RETSPLs) would be rendered

independent of earphone model if they were referred to an ear simulator having acoustical properties

exactly simulating those of the average human ear. A device designed with this aim in view is

standardized in IEC 60318-1. The original data for the ISO 389 series were presented in ISO 389:1985,

Addendum 1, which was prepared based on an assessment of technical data provided by laboratories

listed in Annex B on RETSPL values specified on the IEC 60318-1 ear simulator and covering a variety

of earphone models. These data were analysed to produce a set of RETSPL values which are, within an

acceptable uncertainty, applicable to earphones of any model within a broadly defined class. A note on

the derivation of the standard values and the origin of the data input is given in Annex B for information.

In recent years, new supra-aural earphone models have been developed and other models have been

revised. If applicable, their RETSPLs were specified both on the IEC 60318-1 ear simulator and the

IEC 60318-3 acoustic coupler, as a result of direct threshold measurements under the preferred test

conditions given in ISO 389-9. These model-specific RETSPL values are given in this document in

separate tables, along with the IEC 60318-3 acoustic coupler RETSPLs for Telephonics TDH 39 and

Beyer DT 48 earphones, which were adopted from the former editions of ISO 389.

1) TDH 39 is the name of a product supplied by Telephonics. This information is given for the convenience of users

of this document and does not constitute an endorsement by ISO of the product name.

2) DT 48 is the name of a product supplied by Beyerdynamic. This information is given for the convenience of users

of this document and does not constitute an endorsement by ISO of the product named.

© ISO 2017 – All rights reserved v
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SIST EN ISO 389-1:2018
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SIST EN ISO 389-1:2018
INTERNATIONAL STANDARD ISO 389-1:2017(E)
Acoustics — Reference zero for the calibration of
audiometric equipment —
Part 1:
Reference equivalent threshold sound pressure levels for
pure tones and supra-aural earphones
1 Scope

This document specifies a standard reference zero for the scale of hearing threshold level applicable

to pure-tone air conduction audiometers, to promote agreement and uniformity in the expression of

hearing threshold level measurements throughout the world.

It states the information in a form suitable for direct application to the calibration of audiometers, that

is, in terms of the reference equivalent threshold sound pressure levels of generic supra-aural earphones

specified in 4.2, measured on an ear simulator complying with IEC 60318-1 and in terms of model-

specific data given in two additional tables for the IEC 60318-3 acoustic coupler and the IEC 60318-1

ear simulator, respectively.

The data are based on an assessment of the information available from the various standardizing

laboratories responsible for audiometric standards and from scientific publications.

Some notes on the application and derivation of the reference levels are given in Annexes A and B.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements 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 60318-1:2009, Electroacoustics — Simulators of human head and ear — Part 1: Ear simulator for the

measurement of supra-aural and circumaural earphones

IEC 60318-3, Electroacoustics — Simulators of human head and ear — Part 3: Acoustic coupler for the

calibration of supra-aural earphones used in audiometry
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at https://www.electropedia.org/
3.1
air conduction
transmission of sound through the external and middle ear to the inner ear
© ISO 2017 – All rights reserved 1
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SIST EN ISO 389-1:2018
ISO 389-1:2017(E)
3.2
acoustic coupler

device for measuring the acoustic output of sound sources where the sound pressure is measured by

a calibrated microphone coupled to the source by a cavity of predetermined shape and volume which

does not necessarily approximate the acoustic impedance of the normal human ear
Note 1 to entry: An acoustic coupler is specified in IEC 60318-3.
3.3
ear sim
...

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