1、October 2007DEUTSCHE NORM English price group 11No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 13.140!$Rf“1472767www.
2、din.deDDIN EN ISO 389-6Acoustics Reference zero for the calibration of audiometric equipment Part 6: Reference threshold of hearing for test signals of short duration(ISO 389-6:2007)English version of DIN EN ISO 389-6:2007-10Akustik Standard-Bezugspegel fr die Kalibrierung audiometrischer Gerte Teil
3、 6: quivalente Bezugs-Schwellenschalldruckpegel fr akustische Kurzzeit-Testsignale(ISO 389-6:2007)Englische Fassung DIN EN ISO 389-6:2007-10www.beuth.deDocument comprises 15 pagesDIN EN ISO 389-6:2007-10 2 Start of validity This standard is valid from 1 October 2007. National foreword This standard
4、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 (Denmark). The responsible German body involved in its preparation was the DKE Deutsche Kommission Elektrotechnik Elektronik Informa
5、tionstechnik im DIN und VDE (German Commission for Electrotechnical Engineering, Electronics and Information Technology of DIN and VDE), Technical Committee GUK 821.6 Hrgerte, Audiometer und Kuppler. For undated references in the normative text (reference to a standard without a date and without ref
6、erence to a specific subclause, table, figure, etc.), the latest valid edition of the referenced standard applies. For dated references in the normative text, only the edition cited applies. The relationship between a cited standard and the relevant German Standard can be seen in the number of the I
7、EC document. For instance, IEC 60068 has been adopted by CENELEC as European Standard EN 60068, which in turn has been published in Germany as DIN EN 60068. ISO 389 consists of the following parts, under the general title Acoustics Reference zero for the calibration of audiometric equipment: Part 1:
8、 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 bone vibrators Part 4: Reference leve
9、ls 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 7: Reference threshold of hearing under free-field and diffuse-field listening conditions Part 8: Reference equivalent threshold sound pressure lev
10、els for pure tones and circumaural earphones Part 9: Preferred test conditions for the standardization of reference equivalent threshold sound pressure levels or vibratory force levels*) *)In course of preparation. Part 6: Reference threshold of hearing for test signals of short duration EUROPEAN ST
11、ANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 389-6July 2007ICS 13.140English VersionAcoustics - Reference zero for the calibration of audiometricequipment - Part 6: Reference threshold of hearing for testsignals of short duration (ISO 389-6:2007)Acoustique - Zro de rfrence pour ltalonnagedquipements a
12、udiomtriques - Partie 6: Niveauxliminaires daudition de rfrence pour signaux dessai decourte dure (ISO 389-6:2007)This European Standard was approved by CEN on 30 June 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this Europe
13、anStandard 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 official versions (English, F
14、rench, 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, Belgium, Bulgaria, Cyprus,
15、 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 STANDARDIZATIONCOMIT EUR
16、OPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2007 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 389-6:2007: E(ISO 389-6:2007)Akustik - Standard-Bezugspegel fr die Kal
17、ibrierung Schwellenschalldruckpegel fr akustische Kurzzeit-Testsignaleaudiometrischer Gerte - Teil 6: quivalente Bezugs-DIN EN ISO 389-6:2007-10 EN ISO 389-6:2007 (E) 2 Contents Page Foreword.3 Introduction 4 1 Scope .5 2 Normative references .5 3 Terms and definitions.5 4 Specifications7 Annex A (i
18、nformative) Information on the correction values for hearing threshold levels with different repetition rates and using head and torso measurements .10 Annex B (informative) Head and torso measurements on clicks 11 Annex C (informative) Notes on the derivation of the reference hearing threshold leve
19、ls for clicks and tone-bursts12 Bibliography .13 DIN EN ISO 389-6:2007-10 EN ISO 389-6:2007 (E)3Foreword This document (EN ISO 389-6:2007) 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
20、by DS. 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 January 2008, and conflicting national standards shall be withdrawn at the latest by January 2008. According to the CEN/CENELEC Internal Regu
21、lations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Neth
22、erlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 389-6:2007 has been approved by CEN as a EN ISO 389-6:2007 without any modification. Introduction IEC 60645-3 specifies audiometric test signals of sh
23、ort duration. These short-duration signals consist of clicks and tone-bursts, and they are used in different diagnostic tests, e.g. in Evoked Response Audiometry such as auditory electrophysiology (electrocochleography, auditory brainstem responses, etc.), and transient evoked otoacoustic emissions.
24、 This part of ISO 389 specifies reference threshold values for the short-duration signals. The reference hearing threshold data for specific transducers described herein will promote agreement and uniformity in the expression of results of hearing threshold measurements. DIN EN ISO 389-6:2007-10 EN
25、ISO 389-6:2007 (E)41 Scope This part of ISO 389 specifies reference hearing threshold levels for tests signals of short duration applicable to the calibration of audiometric equipment where such signals are used. NOTE 1 Some notes on different parameters and their effects on threshold levels are giv
26、en in Annex A. NOTE 2 Preferred test conditions for determining hearing thresholds for standardization are specified in ISO 389-9. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. F
27、or undated references, the latest edition of the referenced document (including any amendments) applies. ISO 389-1, Acoustics Reference zero for the calibration of audiometric equipment Part 1: Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones IEC 60318-1,
28、 Electroacoustics Simulators of human head and ear Part 1: Ear simulator for the calibration of supra-aural and circumaural earphones 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 inserts 1)IEC 603
29、18-6, Electroacoustics Simulators of human head and ear Part 6: Mechanical coupler for the measurements on bone vibrators 2)IEC 61094-1, Measurement microphones Part 1: Specifications for laboratory standard microphones 3 Terms and definitions For the purposes of this document, the terms and definit
30、ions given in ISO 389-1 and the following apply. 3.1 short-duration signal signal having a duration of less than 200 ms 1) Revision of IEC 60711:1981. 2) Revision of IEC 60373:1990. DIN EN ISO 389-6:2007-10 EN ISO 389-6:2007 (E)53.2 click transient acoustic or vibratory signal whose frequency spectr
31、um covers a broad frequency range, and which is produced by applying a single rectangular pulse to a transducer 3.3 tone-burst sinusoidal signal multiplied by a time window of less than 200 ms 3.4 condensation signal short-duration signal, the initial pressure wave of which causes an over-pressure r
32、elative to ambient pressure, or the initial force wave of which causes an over-force relative to the static force at the plane of the output port of the transducer 3.5 rarefaction signal short-duration signal, the initial pressure wave of which causes an under-pressure relative to ambient pressure,
33、or the initial force wave of which causes an under-force relative to the static force at the plane of the output port of the transducer 3.6 alternating polarity signal series of short-duration signals, alternating between rarefaction and condensation signals 3.7 reference pulse electric rectangular
34、pulse (single monophasic rectangular wave) of (100 10) s duration with rise and fall times less than 25 s as specified in IEC 60645-3:2007, 5.2 NOTE The signal output of the transducer can vary considerably depending upon the type used. 3.8 reference tone-burst electric signal consisting of five per
35、iods of the fundamental sine wave and having a linear rise and fall of 1,6 periods and a duration of three periods as specified in IEC 60645-3:2007, 5.3 NOTE 1,6 periods of linear rise and fall corresponds to two periods from zero to 100 % amplitude. The signal envelope remains at the 100 % amplitud
36、e for one period. The reference tone-burst can also be described according to the 2-1-2 concept where 2 indicates the number of periods from zero to 100 % amplitude and back to zero, and 1 is the 100 % amplitude period. 3.9 reference equivalent threshold sound pressure level RETSPL at a specified fr
37、equency, the median value of the equivalent threshold sound pressure levels of a sufficiently large number of ears of otologically normal persons, of both sexes, aged between 18 years and 25 years inclusive, expressing the threshold of hearing in a specified ear simulator for a specified type of ear
38、phone 3.10 reference equivalent threshold vibratory force level, monaural listening RETVFL at a specified frequency, the median value of the equivalent threshold vibratory force levels of a sufficiently large number of ears of otologically normal persons, of both sexes, aged between 18 years and 25
39、years inclusive, expressing the threshold of hearing in a specified mechanical coupler for a specified configuration of bone vibrator DIN EN ISO 389-6:2007-10 EN ISO 389-6:2007 (E)63.11 reference threshold sound pressure level RTSPL at a specified frequency, the median value of the threshold sound p
40、ressure levels of a sufficiently large number of otologically normal persons, of both sexes, aged between 18 years and 25 years inclusive, expressing the threshold of hearing under free-field conditions 3.12 peak-to-peak equivalent signal level root-mean-square (r.m.s.) value of a long-duration sinu
41、soidal signal which, when compared under the same test conditions with a short-duration output signal from the transducer under test, has the same peak-to-peak value (i.e. difference between the extreme positive and the extreme negative values) as the short-duration signal NOTE 1 For clicks (3.2), t
42、he long-duration sinusoidal signal should have a frequency of 1 000 Hz, and for tone-bursts (3.3) its frequency should equal the fundamental frequency of the tone-burst. NOTE 2 The term peak-to-peak equivalent signal level is often called peak equivalent signal level. NOTE 3 The peak level of a shor
43、t-duration signal is between 3 dB and 9 dB greater than the peak-to-peak equivalent level, i.e. 3 dB when the signal is quite symmetrical around the zero baseline and 9 dB when it is completely on one side of the zero level. NOTE 4 The recommended abbreviations for peak-to-peak equivalent (pe) sound
44、 pressure level and vibratory force level are peSPL and peVFL. 3.13 peak-to-peak equivalent reference equivalent threshold sound pressure level or vibratory force level peRETSPL/peRETVFL peak-to-peak equivalent RETSPL or RETVFL value NOTE The equivalence in this clause when the full terms (peRETSPL
45、or peRETVFL) are used is between two different signals. When short-duration signals are standardized as sound pressure levels or vibratory force levels for hearing threshold purposes, a further equivalence occurs due to the method of measuring hearing threshold levels in an ear simulator or on a mec
46、hanical coupler, respectively, i.e. in terms of equivalent threshold sound pressure or vibratory force levels. 3.14 peak-to-peak equivalent reference threshold sound pressure level peRTSPL peak-to-peak equivalent RTSPL value 4 Specifications The reference hearing threshold levels depend on the type
47、of test signal (click, tone-burst), the type of transducer (earphone, bone vibrator, loudspeaker) and the equipment used for calibration (ear simulator, free field). The recommended standard values for the click signal based on the reference pulse are given in Tables 1 to 3. They are derived from de
48、terminations of the threshold of hearing of otologically normal persons (conditions given in References 4 to 6). Similarly, the recommended standard values for the reference tone-burst signals are given in Table 4. They are derived from determinations of the threshold of hearing of otologically norm
49、al persons (conditions given in References 6 to 8). DIN EN ISO 389-6:2007-10 EN ISO 389-6:2007 (E)7Table 1 Recommended peRETSPLs for groups of clicks based on the electric reference pulse with a repetition rate of 20 Hz and a duration of 1 s for the click train sequence Earphones (monaural hearing) peRETSPL (re 20 Pa) Type of earphone Ear simulator used according to dB aSennheiser HDA 200 IEC 60318-1 28,0 Maico BERAphone IEC 60318-1 33,0 bTelephonics TDH-39 IEC 60318-1 31,0 Beyer DT 48 IEC 60318-
