EN ISO 389-2:1996

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.IHUHQþQHAkustik - Standard-Bezugspegel für die Kalibrierung audiometrischer Geräte - Teil 2: Äquivalente Bezugs-Schwellenschalldruckpegel für reine Töne und Einsteckhörer (ISO 389-2:1994)Acoustique - Zéro de référence pour l'étalonnage d'équipements audiométriques - Partie 2: Niveaux de référence équivalents de pression acoustique liminaire pour les écouteurs a son purs et a insertion (ISO 389-2:1994)Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones (ISO 389-2:1994)17.140.50ElektroakustikaElectroacoustics13.140Vpliv hrupa na ljudiNoise with respect to human beingsICS:Ta slovenski standard je istoveten z:EN ISO 389-2:1996SIST EN ISO 389-2:1999en01-november-1999SIST EN ISO 389-2:1999SLOVENSKI
STANDARD
INTERNATIONAL STANDARD ISO 389-2 First edition 1994-07-15 Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold Sound pressure Ievels for pure tones and insert earphones Acous tique - Zero de rdfbrence pour Malannage d%quipements audiombtriques - Partie 2: Niveaux de hf&ence Äquivalents de Pression acoustique liminaire pour les 6couteurs a son purs et ti insertion Reference number ISO 389-2:1994(E) SIST EN ISO 389-2:1999

ISO 389-2: 1994(E) Foreword ISO (the International Organization for Standardizationf 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. Esch 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 patt in the work. ISO collaborates closely with the International Electrotechnical Commission (1 EC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 389-2 was prepared by Technical Committee lSO/rC 43, Acoustics. ISO 389 consists of the following Parts, under the general title Acoustics - Reference zero for the calibration of audiometric equipment: - Part 1: ßeference equivalent threshold Sound pressure levels for pure tones and supra-aural earphones - Part 2: ßeference equivalent threshold Sound pressure levels for pure tones and insert earphones - Part 3: ßeference equivalent threshold forte levels for pure tones and bone Vibrators - Part 4: Reference levels for narrow-band masking noise - Part 5: ßeference equivalent threshold Sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz - Part 6: Re ference equivalent threshold Sound pressure levels for acoustic test Signals of short duration - Part 7: Reference threshold of hearing under free-field and diffuse- field listening conditions 63 ISO 1994 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronie or mechanical, including photocopying and microfilm, without Permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-l 211 Geneve 20 l Switzerland Printed in Switzerland ii SIST EN ISO 389-2:1999

Part 1 will be a re-issue of ISO 389:1991. Annexes A and B of this part of ISO 389 are for information only. . . . Ill SIST EN ISO 389-2:1999

ISO 389-2: 1994(E) 0 ISO Introduction Esch part of International Standard ISO 389 specifies a specific reference zero for the calibration of audiometric equipment. ISO 389:1991 (to be re-issued as ISO 389-1) contains values of reference equivalent threshold Sound pressure levels (RETSPL) for pure tones and two specified Patterns of supra-aural earphones used in conjunction with an acoustic coupler conforming to IEC 303, and for other supra-aural earphones of specified Patterns in conjunction with an artificial ear conforming to IEC 318. ISO 389-4 specifies reference Ievels for narrow-band masking noise based on these RETSPL data. In some audiological applications it may, however, be desirable to use in- sert earphones to deliver either the test Signal or the masking noise, e.g. to reduce the occlusion effect or interaural effects. RETSPL data for these kinds of earphone are specified in this part of ISO 389. lt is based on an assessment of technical data provided by laboratories in different coun- tries representing the most reliable data available at the time. lt is recognized that small differentes may occur between results of hearing threshold Ievel measurements obtained by audiometric equipment using different Patterns of earphone, i.e. supra-aural or insert earphones. SIST EN ISO 389-2:1999

INTERNATIONAL STANDARD 0 ISO ISO 389-2: 1994(E) Acoustics - Reference zero for the calibration of audiometric equipment - Part 2: Reference equivalent threshold Sound pressure Ievels for pure tones and insert earphones 1 Scope This part of ISO 389 specifies reference equivalent threshold Sound pressure levels (RETSPL) for the calibration of pure-tone audiometers supplementary to those specified in ISO 389:1991? Values given in this part of ISO 389 are applicable to insert earphones of a Pattern specified in clause 4. NOTE 1 For information, a note on the derivation of the reference values and the origin of the data input is given in annex A, and a bibliography is given in annex B. 2 Normative references The following Standards contain provisions which, through reference in this text, constitute provisions of this patt of ISO 389. At the time of publication, the editions indicated were valid. All Standards are subject to revision, and Parties to agreements based on this part of ISO 389 are encouraged to investigate the possibility of applying the most recent editions of the Standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 389:1991, Acoustics - Standard reference zero for the calibration of pure-tone air conduction audiometers. l) IEC 126:1973, IEC reference coupler for the measurement of hearing aids using earphones coup- led to the ear by means of ear insefls. IEC 711:1981, Occluded-ear simula tor for the measurement of earphones coupled to the ear by ear inserts. 3 Definitions For the purposes of this patt of ISO 389, the defi- nitions given in ISO 389:1991 together with the fol- lowing definitions apply. 3.1 ear insert: Device used to provide the acoustic coupling between an earphone and the ear canal. NOTE 2 This may be, for example, an earmould or a similar device with or without a connecting tube. 3.2 insert earphone: Small earphone coupled to the ear canal by means of an ear insert, or attached to a connecting element which is inserted into the ear ca- nal. The ear insert may be a patt of the insert earphone. 3.3 ear simulator: Device for measuring the output Sound pressure of an earphone under weil-defined loading cond
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