BS-5363-1976 ISO-3382-1975.pdf
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1、BRITISH STANDARD BS 5363:1976 ISO 3382:1975 Method for Measurement of reverberation time in auditoria ISO title : Acoustics Measurement of reverberation time in auditoria UDC 534.843.242.2 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:05:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5
2、363:1976 This British Standard, having been prepared under the direction of the Acoustics Committee, was published under the authority of the Executive Board on 30 June 1976 BSI 03-1999 The following BSI references relate to the work on this standard: Committee reference E/1/6 Draft for comment 74/2
3、7122DC ISBN 0 580 09164 3 Cooperating organizations The Acoustics Committee, under whose supervision this British Standard was prepared, consists of representatives from the following Government departments and scientific and industrial organizations: Association of Consulting Engineers Institute of
4、 Acoustics British Broadcasting Corporation* British Kinematograph Sound and Television Society British Radio Equipment Manufacturers Association Cinematograph Exhibitors Association of Great Britain and Ireland Department of Industry National Physical Laboratory* Engineering Equipment Users Associa
5、tion Incorporated Association of Architects and Surveyors Institution of Electronic and Radio Engineers Institution of Mechanical Engineers Institution of Municipal Engineers* Institute of Physics* Institute of Sound and Vibration Research Post Office Royal Institute of British Architects* Society o
6、f British Aerospace Companies Transmission Distributors Association (BEAMA) The Government departments and scientific and industrial organizations marked with an asterisk in the above list, together with the following, were directly represented on the Committee entrusted with the preparation of this
7、 British Standard: Association of Building Component Manufacturers Brick Development Association Building Board Manufacturers Association Department of Education and Science Department of the Environment Department of Health and Social Security European Flooring Institute Gypsum Product Development
8、Association Heating Ventilating and Air Conditioning Manufacturers Association Ltd. Metal Fixing Association for Ceiling Systems National Brass Foundry Association National Water Council Structural Insulation Association Amendments issued since publication Amd. No.Date of issueComments Licensed Copy
9、: sheffieldun sheffieldun, na, Mon Dec 04 16:05:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5363:1976 BSI 03-1999i Contents Page Cooperating organizationsInside front cover Forewordii 0Introduction1 1Scope and field of application1 2References1 3Definitions1 4Measurement procedures1 5Statement
10、of results3 Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:05:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5363:1976 ii BSI 03-1999 Foreword This British Standard is identical with International Standard ISO 3382 “Acoustics Measurement of reverberation time in auditoria”. For the purp
11、oses of this British Standard the text of ISO 3382 given in this publication should be modified as follows. Terminology. The words “British Standard” should replace “International Standard” wherever they appear. The decimal point should replace the decimal comma wherever it appears. Cross-references
12、. The references to other International Standards and IEC Publications should be replaced by references to British Standards as follows: A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application
13、. Compliance with a British Standard does not of itself confer immunity from legal obligations. References to ISO/IEC PublicationAppropriate British Standard ISO 266 Acoustics Preferred frequencies for mesurements BS 3593 Recommendation on preferred frequencies for acoustical measurements ISO/R354 M
14、easurement of absorption coefficients in a reverberation room BS 3638 Method for the measurement of sound absorption coefficients (ISO) in a reverberation room IEC Publication 225 Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations BS 2475 Specificati
15、on for octave and one third octave band-pass filters Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 3 and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in t
16、he amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Mon Dec 04 16:05:33 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 5363:1976 BSI 03-19991 0 Introduction The general evaluation of sound decay in an auditorium in its working condition depends on many parameters
17、, for example the properties of the source. However, the reverberation time is the physical value which is commonly used to describe the acoustical behaviour of auditoria of all kinds. At present, several methods exist for the measurement of reverberation time and there are some new ideas in this fi
18、eld. Each of these methods may give a different result for the same auditorium. The reasons for such differences lie in the different types of signal employed as well as the methods of recording the decay of sound. The general standardization of all possible methods of measurement of reverberation t
19、ime, therefore, seems to be premature. It is necessary and important, however, to approach this standardization by steps. The first step is to standardize a widely used method so that it is possible to compare the data obtained by this one method. 1 Scope and field of application This International
20、Standard specifies a method for the measurement of reverberation time in auditoria by describing the state of occupancy of an auditorium for which the reverberation time is required, the measurement procedure, the apparatus necessary, and the method of evaluating the data and of presenting the test
21、report. 2 References ISO 266, Acoustics Preferred frequencies for measurements. ISO/R 354, Measurement of absorption coefficients in a reverberation room. IEC Publication 225, Octave, half-octave and third-octave band filters intended for the analysis of sounds and vibrations. 3 Definitions For the
22、purposes of this International Standard, the following definitions apply. reverberation time T the time that would be required for the sound pressure level to decrease by 60 dB after the source has stopped (see ISO/R 354) NOTEThis definition is based on the assumption that in the ideal case the depe
23、ndence of sound pressure level upon time is a straight-line relationship and that the background level is sufficiently low. states of occupancy there are at least three significant values for the reverberation time of auditoria, which depend on different states of occupancy: a) empty state: the audi
24、torium prepared for a performance and ready for receiving performers and public, but without these persons present b) studio state: the auditorium occupied by the performers only (without public), for example at rehearsals or during sound recordings. The number of performers and other persons, such
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