1、August 2012 Translation by DIN-Sprachendienst.English price group 21No part of this translation 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
2、 13.140!$St“1934881www.din.deDDIN EN ISO 8253-3Acoustics Audiometric test methods Part 3: Speech audiometry (ISO 8253-3:2012);English version EN ISO 8253-3:2012,English translation of DIN EN ISO 8253-3:2012-08Akustik Audiometrische Prfverfahren Teil 3: Sprachaudiometrie (ISO 8253-3:2012);Englische F
3、assung EN ISO 8253-3:2012,Englische bersetzung von DIN EN ISO 8253-3:2012-08Acoustique Mthodes dessais audiomtriques Partie 3: Audiomtrie vocale (ISO 8253-3:2012);Version anglaise EN ISO 8253-3:2012,Traduction anglaise de DIN EN ISO 8253-3:2012-08SupersedesDIN EN ISO 8253-3:1998-10www.beuth.deDocume
4、nt comprises pagesIn case of doubt, the German-language original shall be considered authoritative.3812.12 DIN EN ISO 8253-3:2012-08 2 A comma is used as the decimal marker. Start of application The start of application for this DIN Standard adopted by CEN as a European Standard on 2012-02-29 is 201
5、2-07-01. DIN EN ISO 8253-3:1998-10 may be used in parallel until 2012-09-01. National foreword This standard falls in the domain of the DKE Deutsche Kommission Elektrotechnik Elektronik Informations-technik im DIN und VDE German Commission for Electrical, Electronic and Information Technologies of D
6、IN and VDE), Working Committee GUK 821.6 Hrgerte und audiometrische Messtechnik. ISO 8253-3:2012 has been prepared by Technical Committee ISO/TC 43 “Acoustics” in collaboration with Technical Committee 211 “Acoustics” (Secretariat: DS, Denmark). For undated references in the normative text (referenc
7、e to a standard without a date and without reference 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 Germ
8、an Standard can be seen in the number of the IEC document. Example: 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. Amendments This standard differs from DIN EN ISO 8253-3:1998-10 as follows: a) Clause 3
9、“Terms and definitions” has been revised; b) Subclause 3.16 “reference recording of speech material” (master recording) has been redefined; c) Subclauses 4.8 “Phonemic balance across test lists” and 4.9 “Perceptual balance across test lists” have been added; d) specifications relating to the validat
10、ion of speech material recordings have been added (Clause 5), for example 5.2 “Determination of reference speech recognition curve”, 5.3 “Determination of perceptual equivalence of test lists” and 5.4 “Determination of repeatability of results (average test-retest reliability)”; e) specifications re
11、lating to adaptive procedures for the determination of speech recognition scores have been added (12.4,12.5,13); f) Annex A “Example of speech materials”, Annex B “Examples of competing sound conditions”, Annex C “Typical results” and Annex D “Optimization of perceptual balance of test lists” have b
12、een added; g) a new detailed Annex E “Measurement uncertainty” has been added. Previous editions DIN EN ISO 8253-3: 1998-10 Supersedes Draft Standard E DIN ISO 8253-3:2009-06. EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 8253-3 March 2012 ICS 13.140 Supersedes EN ISO 8253-3:1998English V
13、ersion Acoustics - Audiometric test methods - Part 3: Speech audiometry (ISO 8253-3:2012) Acoustique - Mthodes dessais audiomtriques - Partie 3: Audiomtrie vocale (ISO 8253-3:2012) Akustik - Audiometrische Prfverfahren - Teil 3: Sprachaudiometrie (ISO 8253-3:2012) This European Standard was approved
14、 by CEN on 29 February 2012. 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 national standard without any alteration. Up-to-date lists and bibliographical references concerning such national s
15、tandards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language an
16、d 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 Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Li
17、thuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brus
18、sels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8253-3:2012: EContents Page Foreword 4 Introduction .5 1 Scope 6 2 Normative references 6 3 Definitions 6 4 Requirements for recording of speech material .10 4.1 General
19、 requirements 10 4.2 Reference recording 10 4.3 Recording environment 11 4.4 Frequency response of recording equipment 11 4.5 Interval between successive test items 11 4.6 Levels 11 4.7 Signal-to-noise ratio 11 4.8 Phonemical balance across test lists 11 4.9 Perceptual balance across test lists 12 5
20、 Validation of speech material recordings .12 5.1 General 12 5.2 Determination of reference speech recognition curve 12 5.3 Determination of perceptual equivalence of test lists .13 5.4 Determination of repeatability of results (average test-retest reliability) 13 5.5 Documentation .14 6 Requirement
21、s for speech audiometry .14 7 Ambient sound pressure levels in test room for speech audiometry 14 8 Sound field speech audiometry .14 9 Preparation and instruction of test subject 15 9.1 General 15 9.2 Preparation of test subject .15 9.3 Instruction of test subject .15 10 Subjects response mode .15
22、11 Determination of speech detection threshold level .16 12 Determination of speech recognition threshold level 16 12.1 General 16 12.2 Descending procedure using 5 dB steps 17 12.3 Alternative descending procedure .17 12.4 Adaptive procedure using fixed step sizes .18 12.5 Other adaptive procedure
23、.19 13 Determination of speech recognition scores .19 14 Contralateral masking .19 15 Speech audiometry with competing sound 20 15.1 Type of competing sound .20 15.2 Presentation of competing sound 20 15.3 Speech and competing sound levels 20 15.4 Test procedure .20 16 Format of speech audiogram .22
24、 17 Measurement uncertainty .22 DIN EN ISO 8253-3:2012-08 EN ISO 8253-3:2012 (E) 2 18 Maintenance and calibration of equipment 23 18.1 General . 23 18.2 Intervals between tests . 23 18.3 Stage A: Routine checking and listening tests 23 18.4 Stage B: Periodic electroacoustic tests 24 18.5 Stage C: Ba
25、sic calibration tests . 24 Annex A (informative) Example of speech materials 25 Annex B (informative) Examples of competing sound conditions 26 Annex C (informative) Typical results . 27 Annex D (informative) Optimisation of perceptual balance of test lists . 29 Annex E (informative) Measurement unc
26、ertainty 30 Bibliography 35 DIN EN ISO 8253-3:2012-08 EN ISO 8253-3:2012 (E) 3 Foreword This document (EN ISO 8253-3:2012) 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 Euro
27、pean Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the
28、 elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document supersedes EN ISO 8253-3:1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
29、following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania,
30、Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 8253-3:2012 has been approved by CEN as a EN ISO 8253-3:2012 without any modification. DIN EN ISO 8253-3:2012-08 EN ISO 8253-3:2012 (E) 4 IntroductionSpeech audiometry is used for the as
31、sessment of hearing in connection with diagnostic evaluation and audiological rehabilitation.The results of speech audiometry depend on the speech material and test method used. This part of ISO 8253 sets conditions for speech materials in order to assure minimum requirements of precision and compar
32、ability between different tests using different speech materials including materials in different languages. It also specifies procedures to be used when testing speech recognition.DIN EN ISO 8253-3:2012-08 EN ISO 8253-3:2012 (E) 5 1 ScopeThis part of ISO 8253 specifies basic methods for speech reco
33、gnition tests for audiological applications.In order to ensure minimum requirements of precision and comparability between different test procedures including speech recognition tests in different languages, this part of ISO 8253 specifies requirements for the composition, validation and evaluation
34、of speech test materials, and the realization of speech recognition tests. This part of ISO 8253 does not specify the contents of the speech material because of the variety of languages.Furthermore, this part of ISO 8253 also specifies the determination of reference values and fulfilment requirement
35、s for the realization and manner of presentation.This part of ISO 8253 specifies procedures and requirements for speech audiometry with the recorded test material being presented by air conduction through an earphone, or from a loudspeaker for sound field audiometry. Methods for using noise either f
36、or masking the non-test ear or as a competing sound are described.Some test subjects, for example children, can require amended test procedures not specified in this part of ISO 8253.Specialized tests such as those used for evaluating directional hearing and dichotic hearing are outside the scope of
37、 this part of ISO 8253.2 Normative referencesThe 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 2
38、66, Acoustics Preferred frequenciesISO 8253-1, Acoustics Audiometric test methods Part 1: Pure-tone air and bone conduction audiometryISO 8253-2, Acoustics Audiometric test methods Part 2: Sound field audiometry with pure-tone and narrow-band test signalsISO/IEC Guide 98-3, Uncertainty of measuremen
39、t Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)IEC 60645-1, Electroacoustics Audiological equipment Part 1: Pure-tone audiometers IEC 60645-2:1993, Audiometers Part 2: Equipment for speech audiometryIEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications3 T
40、erms and definitionsFor the purposes of this document, the terms and definitions given in ISO 8253-1 and ISO 8253-2 and the following apply.DIN EN ISO 8253-3:2012-08 EN ISO 8253-3:2012 (E) 6 3.1speech signalacoustic signal which carries information in a given languageNOTE A speech signal may be a vo
41、ice signal or an acoustic signal simulating a voice signal.3.2test itemparticular monosyllabic or polysyllabic word or logatom, or sentence, or time-limited segment of connected speech, used in accordance with defined rules of presentation and scoring in a speech audiometric procedureNOTE Scoring ma
42、y be based on a complete test item or parts thereof being correctly recognized.3.3speech materialentire set of test items which is used for speech recognition testsNOTE Usually the speech material is subdivided into several test lists. 3.4open-set test materialset of test items in which the number o
43、f alternative responses to each test item is unlimited3.5closed-set test materialset of test items in which the number of alternative responses to each test item is limited3.6phonemesmallest recognizable unit of speech in a given natural language3.7phoneme classsubdivision of phonemes that show char
44、acteristic similarities in vocal production mode as well as in acoustical signal properties3.8syllablesegment of speech which consists of a vowel with or without one or more accompanying consonants immediately preceding or following3.9spondeetwo-syllable word with equal stress on each syllable3.10lo
45、gatomsyllabic unit that has no verbal meaning to the listenerNOTE A logatom is sometimes called a “nonsense syllable”.3.11test listnumber of selected test items, presented and scored as a single unit3.12set of test itemsselected number of test items from a test listDIN EN ISO 8253-3:2012-08 EN ISO 8
46、253-3:2012 (E) 7 3.13phonemically balanced test listtest list which contains approximately the same proportions of the various phonemes as are present in typical speech communication within a given language3.14perceptually balanced test listtest list which yield equivalent speech recognition score w
47、ith minimized variance at a specified speech level under equivalent conditions (specified manner of presentation and specified group of listeners)NOTE Usually the specified group of listeners consists of otologically normal persons with an age from 18 years to 25 years inclusive. For special tests,
48、different groups (e.g. otologically normal children within a specified age range) may be used as well.3.15carrier phrasesentence or phrase in which a test item is embedded such that the correct recognition of the test item is not dependent upon the context or meaning of the sentence or phrase3.16reference recording of speech materialmaster recordingwell-defined recording that represents the speech material and that is used for validation and application of the speech material3.17speech levelequivalent continuous sound
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