BS EN 24869-1-1993 听力保护器的声衰减.主观测量法.pdf
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1、BRITISH STANDARD BS EN 24869-1:1993 ISO 4869-1: 1990 Incorporating Amendment No. 1 Sound attenuation of hearing protectors Part 1: Subjective method of measurement The European Standard EN 24869-1:1992 has the status of a British Standard UDC 614.892:620.1:534.61:534.833.5 BS EN 24869-1:1993 This Br
2、itish Standard, having been prepared under the direction of the Environment and Pollution Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 28 June 1991 BSI 08-1999 First published July 1974 Second edition September 1983 Third edition June
3、1991 The following BSI references relate to the work on this standard: Committee reference EPC/1 Draft announced in BSI News July 1989 ISBN 0 580 19628 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Environment and Pollution Standards
4、 Policy Committee (EPC/-) to Technical Committee EPC/1, upon which the following bodies were represented: Association of Consulting Engineers British Broadcasting Corporation British Occupational Hygiene Society British Telecommunications plc Department of Health Department of the Environment (Build
5、ing Research Establishment) Department of Trade and Industry (Air Division) Department of Trade and Industry (National Physical Laboratory) Engineering Equipment and Materials Users Association Health and Safety Executive Incorporated Association of Architects and Surveyors Institute of Acoustics In
6、stitute of Occupational Hygienists Institute of Physics Institute of Sound and Vibration Research Institution of Civil Engineers Institution of Electrical Engineers Royal Institute of British Architects Society of Environmental Engineers Transmission and Distribution Association (BEAMA Ltd.) The fol
7、lowing bodies were also represented in the drafting of the standard, through subcommittees and panels: Electricity Supply Industry in UK Industrial Safety (Protective Equipment) Manufacturers Association Institution of Mechancial Engineers Ministry of Defence Society of Hearing Aid Audiologists Ltd.
8、 University of Salford Amendments issued since publication Amd. No.DateComments 7552February 1993Indicated by a sideline in the margin BS EN 24869-1:1993 BSI 08-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions3 4Me
9、asurement of the sound attenuation of hearing protectors4 Annex A (informative) Uncertainty of sound attenuation measurements8 Annex B (informative) Bibliography8 Table 1 Allowable field variation for different microphones5 Table 2 Maximum permissible background sound pressure level5 Table 3 Minimum
10、 and maximum sound pressure levels for test signals5 Table A.1 Repeatability and reproducibility of sound attenuation measurements on ear-muffs at a probability level of 95 % (according to ISO 5725)8 Table A.2 Repeatability and reproducibility of sound attenuation measurements on ear-plugs at a prob
11、ability level of 95 % (according to ISO 5725)8 Publication(s) referred toInside back cover BS EN 24869-1:1993 ii BSI 08-1999 National foreword This Part of BS 5108 has been prepared under the direction of the Environment and Pollution Standards Policy Committee. It is identical with ISO 4869-1:1990
12、“Acoustics Hearing protectors Part 1: Subjective method for the measurement of sound attenuation”, published by the International Organization for Standardization (ISO). ISO 4869-1 was prepared by Subcommittee 1, Noise, of ISO Technical Committee 43, Acoustics, with the active participation and appr
13、oval of the UK. It constitutes a minor revision of ISO 4869:1981. In 1992 the European Committee for Standardization (CEN) accepted ISO 4869-1:1990 as European Standard EN 24869-1:1992. As a consequence of implementing the European Standard this British Standard is renumbered as BS EN 24869-1 and an
14、y reference to BS 5108-1:1991 should be read as a reference to BS EN 24869-1. This Part of BS 5108 is a revision of BS 5108:1983, which is withdrawn. Further revised Parts of BS 5108 are in preparation. A second Part will be based on ISO4869-2 “Estimated noise reduction of hearing protectors” and a
15、third Part is envisaged, based on a future revision of ISO/TR 4869-3:1989 “Simplified method for the measurement of insertion loss of ear-muff type protectors for quality inspection purposes” which was implemented, dual-numbered as DD 192:1990. Hearing protectors are commonly used to reduce the nois
16、e to which the ear is exposed. Hearing protectors are manufactured as ear-plugs, ear-muffs or helmets. A standardized method of sound attenuation measurement allows performance data obtained in different locations under similar conditions to be compared. The data may be used for rank ordering and se
17、lection of different models and the evaluation of design and construction features that affect performance. Cross-references International StandardCorresponding British Standard ISO 354:1985BS 3638:1987 Method for measurement of sound absorption in a reverberation room (Identical) ISO 389:1985BS 249
18、7 Standard reference zero for the calibration of pure tone air conduction audiometers Part 5:1988 Specification for a standard reference zero using an acoustic coupler complying with BS 4688 (Identical) ISO 5725:1986BS 5497 Precision of test methods Part 1:1987 Guide for the determination of repeati
19、bility and reproducibility for a standard test method by inter-laboratory tests (Identical) ISO 6189:1983BS 6655:1986 Specification for pure tone air conduction threshold audiometry for hearing conservation purposes (Identical) IEC 225:1966BS 2475:1964 Specification for octave and one-third octave b
20、and-pass filters (Technically equivalent) IEC 263:1982BS 6397:1983 Specification for scales and sizes for plotting frequency characteristics and polar diagrams (Identical) BS EN 24869-1:1993 BSI 08-1999iii The Technical Committee has reviewed the provisions of ISO 8253-2, to which reference is made
21、in clause 2 and 4.5.5 and in a note to 3.7, and of the draft of IEC 645-1, to which reference is made in clause 2 and 4.3.4, and has decided that they are acceptable for use in conjunction with this standard. ISO 8253-1, to which reference is made in a note to 3.6 and in the informative bibliography
22、, is given for information only and does not affect the use of this Part of BS 5108. 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. Compliance with a British Standard does not of its
23、elf confer immunity from legal obligations. International StandardCorresponding British Standard IEC 651:1979BS 5969:1981 Specification for sound level meters (Identical) IEC 804:1985BS 6698:1986 Specification for integrating-averaging sound level meters (Identical) Summary of pages This document co
24、mprises a front cover, an inside front cover, pages i to iv, the EN title page, pages 2 to 8, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.
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