1、BRITISH STANDARDBS EN ISO 389-5:2006Acoustics Reference zero for the calibration of audiometric equipment Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz The European Standard EN ISO 389-5:2006 has the status of a British StandardICS
2、 13.140g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58BS EN ISO 389-5:2006This British Standard was published under the authority of the Standards
3、Policy and Strategy Committee on 28 February 2007 BSI 2007ISBN 978 0 580 50294 1National forewordThis British Standard was published by BSI. It is the UK implementation of EN ISO 389-5:2006. It supersedes BS EN ISO 389-5:2001 which is withdrawn.The UK participation in its preparation was entrusted b
4、y Technical Committee EH/1, Acoustics, to Subcommittee EH/1/1, Hearing.A list of organizations represented on EH/1/1 can be 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.
5、Compliance with a British Standard cannot confer immunity from legal obligations.Amendments issued since publicationAmd. No. Date CommentsEUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 389-5November 2006ICS 13.140 Supersedes EN ISO 389-5:1999 English VersionAcoustics - Reference zero for the
6、calibration of audiometricequipment - Part 5: Reference equivalent threshold soundpressure levels for pure tones in the frequency range 8 kHz to16 kHz (ISO 389-5:2006)Acoustique - Zro de rfrence pour ltalonnagedquipements audiomtriques - Partie 5: Niveaux derfrence quivalents de pression acoustique
7、liminaire pourles sons purs dans le domaine de frquences de 8 kHz 16 kHz (ISO 389-5:2006)Akustik - Standard-Bezugspegel fr die Kalibrierungaudiometrischer Gerte - Teil 5: quivalente Bezugs-Schwellenschalldruckpegel fr reine Tne imFrequenzbereich 8 kHz bis 16 kHz (ISO 389-5:2006)This European Standar
8、d was approved by CEN on 6 November 2006.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such
9、 nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and
10、notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Nether
11、lands, Norway, Poland, Portugal, Romania,Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2006 CEN All rights of exploitation in a
12、ny form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 389-5:2006: EForeword 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 May 2007, and conflicting national standar
13、ds shall be withdrawn at the latest by May 2007. This document supersedes EN ISO 389-5:1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Den
14、mark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 389-5:2006 has been approved
15、by CEN as EN ISO 389-5:2006 without any modifications. EN ISO 389-5:2006This document (EN ISO 389-5:2006) 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 DS. Reference numberISO 389-5
16、:2006(E)INTERNATIONAL STANDARD ISO389-5First edition2006-11-15Acoustics Reference zero for the calibration of audiometric equipment Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz Acoustique Zro de rfrence pour ltalonnage dquipements
17、 audiomtriques Partie 5: Niveaux de rfrence quivalents de pression acoustique liminaire pour les sons purs dans le domaine de frquences de 8 kHz 16 kHz EN ISO 389-5:2006ii iiiContents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Specifications 2
18、 Annex A (informative) Notes on the derivation of the reference equivalent threshold sound pressure levels for audiometric earphones in the frequency range from 8 kHz to 16 kHz. 3 Annex B (informative) RETSPL values for Koss HV/1A . 4 Bibliography . 6 EN ISO 389-5:2006iv Foreword ISO (the Internatio
19、nal 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
20、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 standar
21、dization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for v
22、oting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 s
23、uch patent rights. ISO 389-5 was prepared by Technical Committee ISO/TC 43, Acoustics. This first edition of ISO 389-5 cancels and replaces ISO/TR 389-5:1998, which has been technically revised. ISO 389 consists of the following parts, under the general title Acoustics Reference zero for the calibra
24、tion of audiometric equipment: Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones Part 2: Reference equivalent threshold sound pressure levels for pure tones and insert earphones Part 3: Reference equivalent threshold force levels for pure tones and
25、 bone vibrators Part 4: Reference levels for narrow-band masking noise Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz Part 6: Reference hearing threshold levels for test signals of short duration Part 7: Reference threshold of heari
26、ng under free-field and diffuse-field listening conditions Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones A part 9, dealing with the preferred test conditions for the determination of reference hearing threshold levelsis under development. EN IS
27、O 389-5:2006vIntroduction An International Standard for extended high frequency audiometers has already been published as IEC 60645-4. Adaptors to be used with the IEC 60318-1 ear simulator to provide an interim acoustic coupler for the calibration of circumaural audiometric earphones in the extende
28、d high frequency range presently are standardized in IEC 60318-2 (to be included in a revised IEC 60318-1). The reference equivalent threshold sound pressure levels for specific circumaural and insert earphones described in this International Standard enable calibration of those audiometers which ar
29、e equipped with these earphones, in order to promote agreement and uniformity in the expression of hearing threshold level measurements worldwide. Annexes A and B of this part of ISO 389 are for information only. A Bibliography is given at the end of this International Standard. EN ISO 389-5:2006bla
30、nk1Acoustics Reference zero for the calibration of audiometric equipment Part 5: Reference equivalent threshold sound pressure levels for pure tones in the frequency range 8 kHz to 16 kHz 1 Scope This part of ISO 389 specifies reference equivalent threshold sound pressure levels (RETSPLs) of pure to
31、nes in the frequency range from 8 kHz to 16 kHz applicable to the calibration of air conduction audiometers for specific earphones. NOTE Some notes and references on the derivation and the test conditions used to determine the reference levels are given in Annex A and the Bibliography. 2 Normative r
32、eferences The following referenced documents are indispensable for the application 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. ISO 389-1, Acoustics Reference zero for
33、 the calibration of audiometric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones ISO 389-2:1994, Acoustics Reference zero for the calibration of audiometric equipment Part 2: Reference equivalent threshold sound pressure levels for pure
34、tones and insert earphones IEC 60318-11), Electroacoustics Simulators for human head and ear Part 1: Ear simulator for the calibration of supra-aural and circumaural earphones IEC 60318-2:19982), Electroacoustics Simulators for human head and ear Part 2: An interim acoustic coupler for the calibrati
35、on of audiometric earphones in the extended high-frequency range IEC 607113), Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 389-1 and IEC 60318-1 apply. 1) Un
36、der revision. 2) To be withdrawn; its contents will be included in a revised IEC 60318-1. 3) To become IEC 60318-4. EN ISO 389-5:20062 4 Specifications The reference equivalent threshold sound pressure levels, RETSPLs, depend on the model of earphone and on the combination of the ear simulator and a
37、dapter used to calibrate it. Specified values for two different earphones an insert earphone (ETYMOTIC RESEARCH ER-2 together with eartips type ER1-14A) and a closed-type circumaural earphone (SENNHEISER HDA 200) are given in Table 1. Table 1 Reference equivalent threshold sound pressure levels RETS
38、PL re. 20 PaadB Frequency Hz Etymotic Research ER-2b,c Ear simulator: IEC 60711eAdapter: ISO 389-2:1994, Figure 2b) SENNHEISER HDA 200b,dEar simulator: IEC 60318-1cAdapter: IEC 60318-2:1998, Figure 1 8 000 19 17,5 9 000 16 19 10 000 20 22 11 200 30,5 23 12 500 37 27,5 14 000 43,5 35 16 000 53 56 NOT
39、E RETSPL values for the KOSS HV/1A earphone, which is no longer in production, are given in Annex B for information. aEach of the values is the arithmetic mean of the median values derived from several laboratories rounded to the nearest half decibel. bModel of earphone with ear simulator and adapte
40、r used. cValues for the Etymotic Research earphone are based on the results of two laboratories (see Annex A). They are derived from determinations of the threshold of hearing of otologically normal persons under conditions as close as possible to those described in Reference 3. The characteristics
41、of SENNHEISER HDA 200 earphone in the extended high-frequency range depend on temperature, especially at 12,5 kHz; see Reference 5. It is therefore recommended to calibrate audiometers equipped with these earphones as closely as possible within the temperature range 21 C to 25 C. dValues for the SEN
42、NHEISER earphone are based on the results of four laboratories. Temperature-dependence information is not available. eIEC 60711 is at present defined in the frequency range up to and including 10 kHz but is according to this document used up to 16 kHz. A revision with a frequency range up to 16 kHz
43、is planned and will become IEC 60318-4. The headband force of the circumaural earphone SENNHEISER HDA 200 shall be within 10,0 1,0 N. The headband force shall be measured when the two earphones are separated by 145 mm and the height of the earphone is adjusted to provide a distance of 130 mm measure
44、d between the centre (top) of the headband and a line between the centres of the earphones. The eartip of the insert earphone ETYMOTIC RESEARCH ER-2 shall be inserted deeply into the ear canal of a test subject so that the outer end of the ear tip is flush with the bottom of the concha. EN ISO 389-5
45、:20063Annex A (informative) Notes on the derivation of the reference equivalent threshold sound pressure levels for audiometric earphones in the frequency range from 8 kHz to 16 kHz The reference equivalent threshold sound pressure levels for audiometric earphones in the frequency range from 8 kHz t
46、o 16 kHz specified in this part of ISO 389 are obtained from the results of five independent experimental investigations given in References 4 to 8. Brief particulars of the tests are given in Table A.1. Table A.1 Investigations of equivalent threshold sound pressure levels for audiometric earphones
47、 in the frequency range from 8 kHz to 16 kHz Investigation Parameter Reference 4 Reference 5 Reference 6 Reference 7 Reference 8 Types of test earphone(s) SENNHEISER HDA 200 SENNHEISER HDA 200 SENNHEISER HDA 200 Etymotic Research ER-2 SENNHEISER HDA 200 Etymotic Research ER-2 Number of test subjects
48、 24 28 31 38 24 Number of ears tested 24 28 62 (HDA 200), 31(ER-2) 38 24 Males/ females 15/9 18/10 17/14 15/23 13/11 Age range of test subjects, years 18 to 23 18 to 24 18 to 25 18 to 25 18 to 25 Frequencies tested, kHz 8 to 9 10 to 11,2 12,5 to 14 16 8 to 9 10 to 11,2 12,5 to 14 16 8 to 9 10 to 11,
49、2 12,5 to 14 16 8 to 9 10 to 11,2 12,5 to 14 16 8 to 9 10 to 11,2 12,5 to 14 16 Type of ear simulator used IEC 60318-1 IEC 60318-1 IEC 60318-1 for HDA 200 IEC 60711 for ER-2 IEC 60318-1 IEC 60711 Type of adapter used for test earphone IEC 60318-2:1998, Figure 1 IEC 60318-2:1998, Figure 1 IEC 60318-2:1998, Figure 1, for HDA 200 and ISO 389-2:1994,Figure 2b), for ER-2 IEC 60318-2:1998, Figure 1 ISO 389-2:1994, Figure2b) Statistical quantity used median median median median
