1、BRITISH STANDARD BS 7643-3: 1993 ISO 6242-3: 1992 Building construction Expression of users requirements Part 3: Acoustical requirements UDC 69.004.2-533:699.844BS7643-3:1993 This British Standard, having been prepared under the directionof the Technical SectorBoard for Building andCivil Engineering
2、, was published under the authorityofthe Standards Boardand comes into effect on 15March1993 BSI 08-1999 The following BSI references relate to the work on this standard: Committee reference B/500 Draft for comment 89/16304 DC ISBN 0 580 21646 2 Committees responsible for this British Standard The p
3、reparation of this British Standard was entrusted by the Technical Sector Board for Building and Civil Engineering (B/-) to Technical Committee B/500, upon which the following bodies were represented: Building Employers Confederation Consumer Policy Committee of BSI Convention of Scottish Local Auth
4、orities Department of Education and Science Department of the Environment Department of the Environment (Building Research Establishment) Incorporated Association of Architects and Surveyors Meteorological Office National Building Specification Ltd. National Council of Building Material Producers Na
5、tional House-Building Council Royal Institute of British Architects Society of Chief Architects of Local Authorities Amendments issued since publication Amd. No. Date CommentsBS7643-3:1993 BSI 08-1999 i Contents Page Committees responsible Inside front cover National foreword ii Introduction 1 1 Sco
6、pe 1 2 Normative references 1 3 Users objectives 2 4 Parameters for expressing users requirements 2 5 Factors affecting the choice of criteria 2 Annex A (informative) Bibliography 6 Table 1 Parameters 3 Table 2 Factors affecting criteria 5 List of references Inside back coverBS7643-3:1993 ii BSI 08-
7、1999 National foreword This Part of BS7643has been prepared under the direction of Technical Committee B/500, Basic data, and is identical with ISO6242-3:1992 Building construction Expression of users requirements Part 3: Acoustical requirements, published by the International Organization for Stand
8、ardization (ISO). ISO6242-3was prepared by Subcommittee3, Functional/user requirements and performance in building construction, with the active participation and approval of the United Kingdom. Cross-references International Standard Corresponding British Standard BS 2750 Measurement of sound insul
9、ation in buildings and of building elements ISO 140-3:1978 Part 3:1980 Laboratory measurements of airborne sound insulation of building elements (Identical) ISO 140-4:1978 Part 4:1980 Field measurements of airborne sound insulation between rooms (Identical) ISO 140-5:1978 Part 5:1980 Field measureme
10、nts of airborne sound insulation of facade elements and facades (Identical) ISO 140-6:1978 Part 6:1980 Laboratory measurements of impact sound insulation of floors (Identical) ISO 140-7:1978 Part 7:1980 Field measurements of impact sound insulation of floors (Identical) ISO 140-8:1978 Part 8:1980 La
11、boratory measurements of the reduction of transmitted impact noise by floor coverings on a standard floor (Identical) ISO 140-9:1985 Part 9:1987 Method for laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it (Identical) BS 5821 Methods for r
12、ating the sound insulation in buildings and of building elements ISO 717-1:1982 Part 1:1984 Method for rating the airborne sound insulation in buildings and of interior building elements (Identical) ISO 717-2:1982 Part 2:1984 Method for rating the impact sound insulation (Identical) ISO 717-3:1982 P
13、art 3:1984 Method for rating the airborne sound insulation of faade elements and faades (Identical)BS7643-3:1993 BSI 08-1999 iii 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. Compli
14、ance with a British Standard does not of itself confer immunity from legal obligations. International Standard Corresponding British Standard ISO 1996-1:1982 BS 7445 Description and measurement of environmental noise Part 1:1991 Guide to quantities and procedures (Identical) ISO 3382:1975 BS 5363:19
15、76 Method for measurement of reverberation time in auditoria (Identical) IEC 651:1979 BS 5969:1981 Specification for sound level meters (Identical) IEC 804:1985 BS 6698:1986 Specification for integrating-averaging sound level meters (Identical) Summary of pages This document comprises a front cover,
16、 an inside front cover, pages i to iv, pages1to 6, 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.iv blankBS7643-3:1993 BSI 08-1999 1 Introduc
17、tion This part of ISO6242is one of a set dealing with the expression of environmental requirements for buildings, in terms suitable for use in regulations and briefs for building projects. The parameters defined can be used for routine verification of the performance of buildings, either by calculat
18、ion (for example at the design stage) or measurement (for example of elements, equipment, spaces or whole buildings), and are meant to provide readily understood information on users requirements throughout the building process. This set of International Standards is not intended to represent the co
19、mplete state of knowledge about these aspects of environmental science, some of which are the concern of other ISO Technical Committees. 1 Scope This part of ISO6242defines how the acoustical requirements of building users can be identified, expressed and quantified. It describes users objectives an
20、d the parameters used to express them. For each parameter, it specifies units of measurement, preferred increments for values and means of evaluation. It also lists the environmental and human factors affecting the choice of a value (criterion) for each parameter. It is intended for use a) in prepar
21、ing briefs for building projects; b) in formulating building laws and regulations; c) in drafting standards and other normative documents; and d) more generally when specifying the required performance of buildings in terms of users requirements. Some of the parameters given in this part of ISO6242a
22、pply only to certain types of building. Compliance with this part of ISO6242does not therefore depend on implementing the whole of its contents in every case. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part o
23、f ISO6242. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of ISO6242are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC
24、and ISO maintain registers of currently valid International Standards. ISO 140-3:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 3: Laboratory measurements of airborne sound insulation of building elements. ISO 140-4:1978, Acoustics Measurement of sound ins
25、ulation in buildings and of building elements Part 4: Field measurements of airborne sound insulation between rooms. ISO 140-5:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 5: Field measurements of airborne sound insulation of facade elements and facades.
26、 ISO 140-6:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 6: Laboratory measurements of impact sound insulation of floors. ISO 140-7:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 7: Field measurements of impact
27、sound insulation of floors. ISO 140-8:1978, Acoustics Measurement of sound insulation in buildings and of building elements Part 8: Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a standard floor. ISO 140-9:1985, Acoustics Measurements of sound insulation
28、in buildings and of building elements Part 9: Laboratory measurement of room-to-room airborne sound insulation of a suspended ceiling with a plenum above it. ISO 717-1:1982, Acoustics Rating of sound insulation in buildings and of building elements Part 1: Airborne sound insulation in buildings and
29、of interior building elements. ISO 717-2:1982, Acoustics Rating of sound insulation in buildings and of building elements Part 2: Impact sound insulation. ISO 717-3:1982, Acoustics Rating of sound insulation in buildings and of building elements Part 3: Airborne sound insulation of facade elements a
30、nd facades. ISO 1996-1:1982, Acoustics Description and measurement of environmental noise Part 1: Basic quantities and procedures. ISO 3382:1975, Acoustics Measurement of reverberation time in auditoria. IEC 651:1979, Sound level meters. IEC 804:1985, Integrating-averaging sound level meters. BS7643
31、-3:1993 2 BSI 08-1999 3 Users objectives 3.1 Control of the acoustical environment within buildings shall fulfil the following objectives: a) to provide a suitable standard of freedom from annoyance due to intrusive noises, whether originating within or outside the building; b) to provide a suitable
32、 standard of speech privacy between rooms or spaces; and c) to provide a suitable standard of acoustic quality within rooms or spaces. 3.2 Criteria to meet these objectives shall reflect the following: a) activities to be accommodated; b) age and health of the occupants; c) proportion of likely occu
33、pants it is intended to satisfy; d) time during which the requirements must be satisfied (taking account of variations in the noise emitted by various sources); and e) acceptable (or required) level of background sound. The choice of some parameters and criteria will differ, depending on the type of
34、 external noise to which the building is subjected. 4 Parameters for expressing users requirements Acoustical comfort, quality and privacy depend on a) the airborne sound insulation provided by interior building elements (walls, floors, doors, etc.); b) the airborne sound insulation provided by exte
35、rior building elements (external walls, facades, windows, etc.); c) the impact sound insulation of floors and walls; d) acceptable sound pressure levels, taking into account any sound required for masking (privacy); and e) the reverberation time of rooms or spaces. 4.1 Location, uniformity and toler
36、ance for acoustical parameters As the level of sound will be essentially uniform in all but the largest rooms or spaces, it is not necessary to state requirements linked to the locations at which the requirements will apply. Uniformity may be required of the acoustic quality of auditoria, but this i
37、nvolves details beyond the scope of this part of ISO6242. The various sound indices incorporate a certain tolerance in their treatment of sound of differing frequencies. Conventional tolerance requirements apply only to reverberation time, and are stated as part of the parameter. 4.2 Expression of a
38、coustical parameters Details of means of expression, together with associated information, are given inTable 1. 5 Factors affecting the choice of criteria Details of factors likely to affect the choice of criteria for particular applications, together with associated information, are given inTable 2
39、.BS7643-3:1993 BSI 08-1999 3 Table 1 Parameters Parameter Definition Means of expression: units; preferred increments Nature of criterion Means of evaluation Airborne sound transmission Alternatives: Decibels (dB); chosen from the series: Maximum Calculation: data on the airborne sound transmission
40、of typical forms of construction may be obtained from national standards, codes of practice or other technical publications 1) Weighted apparent sound reduction index, R w 25 28 30 33 35 38 40 43 45 48 50 53 dB 2) Weighted standardized level difference, D nT, w Measurement: 1) for interior building
41、elements, and for sound transmission between rooms, in accordance with ISO 140-3 and ISO 140-4 See ISO 717-1 2) for exterior building elements, in accordance with ISO 140-5 and ISO 717-3 Impact sound transmission (for floors) Alternatives: Decibels (dB); chosen from the series: Maximum Calculation:
42、data on the impact sound transmission of typical forms of construction may be obtained from national standards, codes of practice or other technical publications 1) Weighted normalized impact sound pressure, L n,w (L n, w ) 35 38 40 43 45 48 50 53 55 58 dB 2) Weighted standardized impact sound press
43、ure level, L nT, w Measurement: single-number quantities for impact sound transmission can be derived in accordance with ISO 140-6 and ISO 140-7 See ISO 717-2BS7643-3:1993 4 BSI 08-1999 Table 1 Parameters Parameter Definition Means of expression: units; preferred increments Nature of criterion Means
44、 of evaluation Sound pressure levels Alternatives: Decibels (dB); chosen from the series: Maximum, which may be stated for specific hours of the day or night, or for specific daytime or night-time periods Calculation: estimation from the character, intensity and distribution over time of external no
45、ise sources, taking into account the airborne sound insulation of the building envelope, in accordance with national standards or codes of practice or regulations 1) A-weighted sound pressure level L pAfor specific types of noise originating from within another part of the building, for example from
46、 equipment 25 28 30 33 35 38 40 43 45 48 50 53 dB Measurement: 1) for L pA , using a sound level meter in accordance with IEC651, having a time weighting of S or F See IEC 651 2) Equivalent continuous A-weighted sound pressure level L Aeq, T , for general noise from external sources (originating eit
47、her outside or within the building) 2) for L Aeq, T , using an integrating averaging sound level meter in accordance with IEC 804, or a sound level meter in accordance with IEC651, averaged over the relevant time interval. For noise of an impulsive or tonal character, measured values may be adjusted
48、 in accordance with ISO 1996-1 See ISO 1996-1 Reverberation time (does not usually need to be specified for residential or other small rooms) The time T required for the sound pressure level to decrease by 60 dB after the sound source has stopped Multiples of 0,1 s Maximum and/or minimum Calculation
49、: estimation from the size, form and acoustic character of surfaces will be possible Measurement: for auditoria, reverberation time shall be measured within a frequency range of at least 125 Hz to4000 Hz, in accordance with ISO 3382. The principles of this test procedure may be applied to other types of roomBS7643-3:1993 BSI 08-1999 5 Table 2 Factors affecting criteria Factor Examples of classes/categories Means of expression Sources of i
