BS-EN-60268-16-2003.pdf
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1、BRITISH STANDARD BS EN 60268-16:2003 Sound system equipment Part 16: Objective rating of speech intelligibility by speech transmission index The European Standard EN 60268-16:2003 has the status of a British Standard ICS 33.160.01 ? Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:49:02 GMT
2、+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 60268-16:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 1 August 2003 BSI 1 August 2003 ISBN 0 580 42335 2 National foreword This British Standard is the official English language version of
3、 EN 60268-16:2003. It is identical with IEC 60268-16:2003. It supersedes BS EN 60268-16:1998 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee EPL/100, Audio, video and multimedia systems and equipment, which has the responsibility to: A list of organiz
4、ations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspon
5、dence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standard Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for their correct application. Compliance with a British Standard does not of
6、itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments a
7、nd promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 28, an inside back cover and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since
8、 publication Amd. No. DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:49:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD EN 60268-16 NORME EUROPENNE EUROPISCHE NORM July 2003 CENELEC European Committee for Electrotechnical Standardization Comit Europen de Norma
9、lisation Electrotechnique Europisches Komitee fr Elektrotechnische Normung Central Secretariat: rue de Stassart 35, B - 1050 Brussels 2003 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members. Ref. No. EN 60268-16:2003 E ICS 33.160.01 Supersedes EN
10、 60268-16:1998 English version Sound system equipment Part 16: Objective rating of speech intelligibility by speech transmission index (IEC 60268-16:2003) Equipements pour systmes lectroacoustiques Partie 16: Evaluation objective de lintelligibilit de la parole au moyen de lindice de transmission de
11、 la parole (CEI 60268-16:2003) Elektroakustische Gerte Teil 16: Objektive Bewertung der Sprachverstndlichkeit durch den Sprachbertragungsindex (IEC 60268-16:2003) This European Standard was approved by CENELEC on 2003-07-01. CENELEC members are bound to comply with the CEN/CENELEC Internal Regulatio
12、ns 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 standards may be obtained on application to the Central Secretariat or to any CENELEC member. This Eu
13、ropean Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CENELEC member into its own language and notified to the Central Secretariat has the same status as the official versions. CENELEC members ar
14、e the national electrotechnical committees of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Lithuania, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: sheffieldu
15、n sheffieldun, na, Mon Nov 13 04:49:02 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Foreword The text of document 100/650/FDIS, future edition 3 of IEC 60268-16, prepared by IEC TC 100, Audio, video and multimedia systems and equipment, was submitted to the IEC-CENELEC parallel vote and was approved b
16、y CENELEC as EN 60268-16 on 2003-07-01. This European Standard supersedes EN 60268-16:1998. The following dates were fixed: latest date by which the EN has to be implemented at national level by publication of an identical national standard or by endorsement (dop) 2004-04-01 latest date by which the
17、 national standards conflicting with the EN have to be withdrawn (dow) 2006-07-01 Annexes designated “normative“ are part of the body of the standard. Annexes designated “informative“ are given for information only. In this standard, annexes A and ZA are normative and annexes B to E are informative.
18、 Annex ZA has been added by CENELEC. _ Endorsement notice The text of the International Standard IEC 60268-16:2003 was approved by CENELEC as a European Standard without any modification. _ Page 2 EN 6026816:2003 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 13 04:49:02 GMT+00:00 2006, Uncontr
19、olled Copy, (c) BSI 062-8616 IE:C2003(E) 3 CONTENTS 1 Scope.5 2 Normative references .5 3 Definitions and abbreviations5 4 Description of the methods.6 4.1 General.6 4.2 The STI method.7 4.3 The STITEL method 8 4.4 The STIPA method 9 4.5 The RASTI method9 4.6 Methods of measurement 12 5 Methods of d
20、etermining intelligibility.14 5.1 Word tests.14 5.2 Modified rhyme tests .14 5.3 Speech Intelligibility Index.14 5.4 Articulation loss of consonants 14 Annex A (normative) Speech transmission index (STI) and revised (STIr) methods15 A.1 Background 15 A.2 The STI method18 A.3 The test signals22 Annex
21、 B (informative) The STITEL method 23 Annex C (informative) The STIPA method24 Annex D (informative) The RASTI method25 Annex E (informative) Qualification of the STI and relation with some subjective intelligibility measures.26 Annex ZA (normative) Normative references to international publications
22、 with their corresponding European publications .27 Bibliography28 Figure 1 Modulation transfer function: input/output comparison6 Figure 2 Relationship between the theoretical STI by the RASTI method and the STI measured by a proprietary equipment with a measurement time of 12 s approximately .10 F
23、igure 3 Conditions under which RASTI results do not differ by more than 0,05.11 Figure A.1 Envelope function (panel A) of a 10 s speech signal for the 250 Hz octave band and corresponding envelope spectrum (panel B).15 Figure A.2 Theoretical expression of the MTF17 Figure A.3 The measurement system
24、and frequencies for the STI method .18 Figure A.4 Auditory masking strength of octave band (k 1) on that above (k) 19 Figure A.5 The relationship between effective signal-to-noise ratio and transmission index for a shift of 15 dB and a range of 30 dB .21 Figure D.1 Illustration of a practical RASTI
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