1、BS EN ISO389-9:2009ICS 13.140NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAcoustics Referencezero for the calibrationof audiometricequipmentPart 9: Preferred test conditions forthe determination of reference hearingthreshold levels (ISO 389-9:2009)This Britis
2、h Standardwas published under theauthority of the StandardsPolicy and StrategyCommittee on 28 February2010 BSI 2010ISBN 978 0 580 70520 5Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 389-9:2009National forewordThis British Standard is the UK implementation of EN ISO 389-9:2009
3、.The UK participation in its preparation was entrusted to TechnicalCommittee EH/1/1, Hearing.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible
4、for its correct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 389-9May 2009ICS 13.140English VersionAcoustics - Reference zero for the calibration of audiometricequipment - Part 9: Preferred test cond
5、itions for thedetermination of reference hearing threshold levels (ISO 389-9:2009)Acoustique - Zro de rfrence pour ltalonnagedquipements audiomtriques - Partie 9: Conditionsdessai prconises pour la dtermination des niveauxliminaires daudition de rfrence (ISO 389-9:2009)Akustik - Standard-Bezugspegel
6、 fr die Kalibrierungaudiometrischer Gerte - Teil 9: Vorzugs-Messbedingungen zur Bestimmung von Bezugs-Hrschwellenpegeln (ISO 389-9:2009)This European Standard was approved by CEN on 30 April 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions
7、 for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three offici
8、al versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Bel
9、gium, Bulgaria, Cyprus, Czech Republic, Denmark, 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.EUROPEAN COMMITTEE FOR S
10、TANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 389-9:2009: EBS EN ISO 389-9:2009EN ISO 389-9:200
11、9 (E) 3 Foreword This document (EN ISO 389-9:2009) 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. This European Standard shall be given the status of a national standard, either
12、by publication of an identical text or by endorsement, at the latest by November 2009, and conflicting national standards shall be withdrawn at the latest by November 2009. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/o
13、r CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic,
14、 Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 389-9:2009 has been a
15、pproved by CEN as a EN ISO 389-9:2009 without any modification. BS EN ISO 389-9:2009ISO 389-9:2009(E) ISO 2009 All rights reserved iiiForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing In
16、ternational 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
17、with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of techn
18、ical committees is to prepare International Standards. 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. Attention is drawn
19、 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. ISO 389-9 was prepared by Technical Committee ISO/TC 43, Acoustics. ISO 389 consists of the following parts, under the
20、general title Acoustics Reference zero for the calibration 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: Referenc
21、e equivalent threshold force levels for pure tones and 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 threshold of hearing for test signals of s
22、hort duration Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones Part 9: Preferred test conditions for the determination of reference hearing threshold le
23、vels BS EN ISO 389-9:2009ISO 389-9:2009(E) iv ISO 2009 All rights reservedIntroduction ISO/TC 43, Acoustics, is responsible for the production of International Standards specifying human hearing thresholds for use in the calibration of audiometric equipment. The Committee bases its work on data from
24、 independent laboratories throughout the world. Unfortunately, problems have existed in the past in trying to relate the data from experiments carried out by different laboratories in different parts of the world, all of which have had the same objective, but which lacked a common set of criteria fo
25、r subject selection, methods of test and reporting of data, etc. ISO/TC 43 has developed this part of ISO 389 in order to collate the data that is being, or will be, produced in the future, and to encourage other laboratories to participate in these activities. The test conditions are aimed at provi
26、ding guidance to researchers to ensure that the collation of future work is made easier, which in turn ought to lead to a more rapid production of relevant standards. BS EN ISO 389-9:2009INTERNATIONAL STANDARD ISO 389-9:2009(E) ISO 2009 All rights reserved 1Acoustics Reference zero for the calibrati
27、on of audiometric equipment Part 9: Preferred test conditions for the determination of reference hearing threshold levels 1 Scope This part of ISO 389 specifies test conditions for determining the hearing thresholds of subjects for the purpose of establishing standardized values for reference hearin
28、g threshold levels. 2 Normative references 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 amendments) applies. ISO 389-1:
29、1998, Acoustics Reference zero for the calibration of audiometric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones1)ISO 389-2, Acoustics Reference zero for the calibration of audiometric equipment Part 2: Reference equivalent threshold s
30、ound pressure levels for pure tones and insert earphones1)ISO 389-3, Acoustics Reference zero for the calibration of audiometric equipment Part 3: Reference equivalent threshold force levels for pure tones and bone vibrators ISO 389-6, Acoustics Reference zero for the calibration of audiometric equi
31、pment Part 6: Reference threshold of hearing for test signals of short duration ISO 389-7, Acoustics Reference zero for the calibration of audiometric equipment Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions ISO 389-8, Acoustics Reference zero for the
32、calibration of audiometric equipment Part 8: Reference equivalent threshold sound pressure levels for pure tones and circumaural earphones ISO 8253-1:2), Acoustics Audiometric test methods Part 1: Basic pure-tone air and bone conduction threshold audiometry ISO 8253-2:3), Acoustics Audiometric test
33、methods Part 2: Sound field audiometry with pure tone and narrow-band test signals 1) Under revision. 2) To be published. (Revision of ISO 8253-1:1989) 3) To be published. (Revision of ISO 8253-2:1992) BS EN ISO 389-9:2009ISO 389-9:2009(E) 2 ISO 2009 All rights reservedISO/IEC Guide 98-3, Uncertaint
34、y of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995) IEC 60318-1, Electroacoustics Simulators of human head and ear Part 1: Ear simulator for the calibration of supra-aural and circumaural earphones 4)IEC 60318-3, Electroacoustics Simulators of human head and ear
35、 Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry IEC 60318-4, Electroacoustics Simulators of human head and ear Part 4: Occluded-ear simulator for the measurement of earphones coupled to the ear by ear inserts 5)IEC 60318-5, Electroacoustics Simulators of hum
36、an head and ear Part 5: 2 cm3coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts IEC 60318-6, Electroacoustics Simulators of human head and ear Part 6: Mechanical coupler for the measurement of bone vibrators IEC 60645-1:2001, Electroacoustics Audiolo
37、gical equipment Part 1: Pure-tone audiometers IEC 60645-3:2007, Electroacoustics Audiometric equipment Part 3: Test signals of short duration IEC 60645-4, Audiometers Part 4: Equipment for extended high-frequency audiometry 3 Terms and definitions For the purposes of this document, the terms and def
38、initions given in ISO 8253-1 and ISO 389-6 apply. 4 Test conditions 4.1 Test subjects 4.1.1 At least 25 subjects shall participate, both males and females, preferably represented in equal numbers. 4.1.2 The subjects shall be in the age range 18 years to 25 years inclusive. 4.1.3 The subjects shall b
39、e otologically normal, i.e. be in a normal state of health, be free from all signs or symptoms of ear disease and from obstructing wax in the ear canals, and have no history of undue exposure to noise, exposure to potentially ototoxic drugs or familial hearing loss. Minimum information to be collect
40、ed is given in Annex A. 4.1.4 Tympanometry shall be performed at the beginning of each test session. Hearing threshold measurements shall be performed only if a middle ear pressure in the range 50 daPa has been obtained. 4.2 Maximum ambient noise levels 4.2.1 The acoustic environment in which the te
41、st subjects are located during testing shall fulfil the requirements given in ISO 8253-1:, 11.1 and 11.2 for measurement of hearing levels down to 10 dB with a maximum uncertainty of +2 dB due to ambient noise. The requirements for 8 kHz shall also be applied to the one-third-octave bands from 10 kH
42、z to 16 kHz. 4) To be published. (Revision of IEC 60318-1:1998 and IEC 60318-2:1998) 5) To be published. (Revision of IEC 60711:1981) BS EN ISO 389-9:2009ISO 389-9:2009(E) ISO 2009 All rights reserved 34.2.2 For typical current supra-aural earphones with sound attenuation as given in ISO 8253-1:, Ta
43、ble 3, conformance with the requirement of 4.2.1 means that noise levels shall be at least 10 dB below the levels given in ISO 8253-1:, Table 2. 4.2.3 If the sound attenuation provided by the actual earphone differs from the values given in ISO 8253-1:, Table 3, the maximum permissible level of nois
44、e shall be modified accordingly. 4.2.4 For sound field audiometry, the acoustic environment shall fulfil the requirement given in ISO 8253-2:, Clause 6. 4.3 Test procedure Monaural pure-tone hearing threshold levels shall be determined according to ISO 8253-1. Binaural hearing threshold levels shall
45、 be determined according to ISO 8253-2. Either the bracketing or ascending method shall be used. Each subject shall have at least one training session with two or three selected test signals. 5 Audiometric equipment 5.1 General The audiometric equipment, which is used for control of stimulus gating
46、and stimulus level and for execution of the test procedure, shall fulfill the relevant requirements of IEC 60645-1 (for air- and bone-conduction pure-tone signals and masking), IEC 60645-3 (only for signals of short duration) and IEC 60645-4 (only for extended high-frequency signals). Special care s
47、hall be taken to avoid detection by the test subjects of any sounds coinciding with the tone and attenuator switching. Calibration of test equipment shall be performed at regular intervals to ensure that levels are within those specified in the prevailing data. ISO 8253-1:, Clause 12 specifies three
48、 stages of maintenance and calibration procedures, and a stage B periodic objective test is required at regular intervals. 5.2 Transducers 5.2.1 General The many different transducers used in hearing threshold measurements will require special attention. Air-conduction and bone-conduction transducer
49、s as well as loudspeakers for sound field measurements are involved. For air-conduction transducers, supra-aural, circumaural and insert earphones are used, and the first two of these will require special attention related to headband force. The use of a correct ear simulator or microphone will also have to be controlled. Relevant International Standards are available for this field (see 5.2.2). 5.2.2 Classes of transducers These include: a) supra-
