1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Acoustics - Reference zero for the calibration of audiometric equipmentPart 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphonesBS EN ISO 389-1:2018National forewordThis Briti
2、sh Standard is the UK implementation of EN ISO 3891:2018. It is identical to ISO 3891:2017. It supersedes BS EN ISO 3891:2000, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EH/1/1, Hearing.A list of organizations represented on this committee can be
3、obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 92334 0ICS 13.140; 17.140.50;
4、11.040.01Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN I
5、SO 3891:2018EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 3891February 2018ICS 13.140 Supersedes EN ISO 3891:2000EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCENCENELEC Management Centre: Avenue Marnix 17, B1000 Brussels 2018 CEN Ref. No.
6、EN ISO 3891:2018: EAll rights of exploitation in any form and by any means reserved worldwide for CEN national MembersAcoustics Reference zero for the calibration of audiometric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supraaural earphones (ISO 3891:2
7、017)Acoustique Zro de rfrence pour ltalonnage dquipements audiomtriques Partie 1: Niveaux de rfrence quivalents de pression acoustique liminaire pour les couteurs sons purs supraauraux (ISO 3891:2017)Akustik StandardBezugspegel fr die Kalibrierung audiometrischer Gerte Teil 1: quivalente BezugsSchwe
8、llenschalldruckpegel fr reine Tne und supra-aurale Kopfhrer (ISO 389-1:2017)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 nation
9、al standard without any alteration. Uptodate lists and bibliographical references concerning such national standards may be obtained on application to the CENCENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version i
10、n 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 R
11、epublic, 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 Kingdo
12、m.English VersionEN ISO 3891:2018 (E)European forewordThis document (EN ISO 3891:2018) 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 sta
13、tus 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 subje
14、ct of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 3891:2000.According to the CENCENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standa
15、rd: 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, Sloven
16、ia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 3891:2017 has been approved by CEN as EN ISO 3891:2018 without any modification.2BS EN ISO 3891:2018ISO 3891:2017Foreword . 1Introduction . 21 Scope . 22 Normative references 23 Terms and definitions . 34
17、 Specifications . 44.1 General . 44.2 Generic supra-aural earphones in conjunction with an IEC 60318-1 ear simulator . 44.3 Model-specific earphones in conjunction with an IEC 60318-1 ear simulator . 54.4 Model-specific earphones in conjunction with an IEC 60318-3 acoustic coupler . 6Annex A (inform
18、ative) Application of the RETSPLs . 8Annex B (informative) Notes on the derivation of the RETSPLs . 9Bibliography .11 ISO 2017 All rights reserved iiiContents PageBS EN ISO 3891:2018iv ISO 2017 All rights reservedBS EN ISO 3891:2018ISO 3891:2017Acoustics - Reference zero for the calibration of audio
19、metric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphonesForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Stand
20、ards 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 ta
21、ke 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 pa
22、rticular, 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 o
23、f 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
24、 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
25、information about ISOs 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 editi
26、on (ISO 3891:1998), 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 l
27、ist of all parts in the ISO 389 series can be found on the ISO website.INTERNATIONAL STANDARD ISO 389-1:2017 ISO 2017 All rights reserved 1BS EN ISO 3891:20181) TDH 39 is the name of a product supplied by Telephonics. This information is given for the convenience of usersof this document and does no
28、t 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 usersof this document and does not constitute an endorsement by ISO of the product named.2 ISO 2017 All rights reservedBS EN ISO 3891:20
29、18ISO 389-1:2017IntroductionEach 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 thres
30、hold 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 603181. The original data for
31、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 603181 ear simulator and covering a variety of earphone models. These data were analysed to prod
32、uce 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
33、models have been developed and other models have been revised. If applicable, their RETSPLs were specified both on the IEC 603181 ear simulator and the IEC 603183 acoustic coupler, as a result of direct threshold measurements under the preferred test conditions given in ISO 3899. These modelspecific
34、 RETSPL values are given in this document in separate tables, along with the IEC 603183 acoustic coupler RETSPLs for Telephonics TDH 391) and Beyer DT 482) earphones, which were adopted from the former editions of ISO 389.1 ScopeThis document specifies a standard reference zero for the scale of hear
35、ing 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, i
36、n 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 603181 and in terms of model specific data given in two additional tables for the IEC 603183 acoustic coupler and the IEC 603181 ear
37、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
38、B.2 Normative referencesThe 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 (includin
39、g any amendments) applies.IEC 603181:2009, Electroacoustics Simulators of human head and ear Part 1: Ear simulator for the measurement of supra-aural and circumaural earphonesIEC 603183, Electroacoustics Simulators of human head and ear Part 3: Acoustic coupler for the calibration of supra-aural ear
40、phones used in audiometryISO 389-1:20173 Terms and definitionsFor 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.or
41、g/obp IEC Electropedia: available at https:/www.electropedia.org/3.1air conductiontransmission of sound through the external and middle ear to the inner ear3.2acoustic couplerdevice for measuring the acoustic output of sound sources where the sound pressure is measured by a calibrated microphone cou
42、pled to the source by a cavity of predetermined shape and volume which does not necessarily approximate the acoustic impedance of the normal human earNote 1 to entry: An acoustic coupler is specified in IEC 603183.3.3ear simulatordevice for measuring the acoustic output of sound sources where the so
43、und pressure is measured by a calibrated microphone coupled to the source so that the overall acoustic impedance of the device approximates that of the normal human ear at a given location and in a given frequency bandNote 1 to entry: An ear simulator is specified in IEC 603181.3.4hearing thresholdl
44、owest sound pressure level or vibratory force level at which, under specified conditions, a person gives a predetermined percentage of correct detection responses on repeated trials3.5otologically normal personperson in a normal state of health who is free from all signs or symptoms of ear disease a
45、nd from obstructing wax in the ear canal, and who has no history of undue exposure to noise, exposure to potentially ototoxic substances, or familial hearing loss3.6equivalent threshold sound pressure level for monaural earphone listeningsound pressure level set up by the earphone in a specified aco
46、ustic coupler (3.2) or ear simulator (3.3) when the earphone is actuated by that voltage which, with the earphone applied to the ear concerned, would correspond to the hearing threshold (3.4) for a given ear, at a specified frequency, for a specified model of earphone and for a stated force of appli
47、cation of the earphone to the human ear3.7reference equivalent threshold sound pressure levelRETSPLmedian value of the equivalent threshold sound pressure levels (3.6) of a sufficiently large number of ears of otologically normal persons (3.5), of both sexes, aged between 18 years and 25 years inclu
48、sive, expressing the threshold of hearing in a specified acoustic coupler or ear simulator for a specified type of earphone at a specified frequencyNote 1 to entry: Other statistical quantities, e.g. mean or modal values, have been used for the derivation of reference data given in this document (se
49、e also Annex B).Note 2 to entry: The relationship between hearing threshold levels for air conduction (3.7) and age is specified in ISO 7029. ISO 2017 All rights reserved 3BS EN ISO 3891:2018a) the earphone and its cushion, if any, shall be axially symmetrical;b) the construction and material shall be suitable for providing a good acoustic seal between theearphone (or its cushion) and the human ear;c) when placed in contact with a plane surface, the contact area of the ear
