《BS-EN-ISO-11654-1997.pdf》由会员分享，可在线阅读，更多相关《BS-EN-ISO-11654-1997.pdf（18页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN ISO 11654:1997 Acoustics Sound absorbers for use in buildings Rating of sound absorption The European Standard EN ISO 11654:1997 has the status of a British Standard ICS 91.120.20 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy
2、, (c) BSI BS EN ISO 11654:1997 This British Standard, having been prepared under the direction of the Health and Environment Sector Board, was published under the authority of the Standards Board and comes into effect on 15 November 1997 BSI 03-2000 ISBN 0 580 28781 5 National foreword This British
3、Standard is the English language version of EN ISO 11654:1997. It is identical with ISO 11654:1997. The UK participation in its preparation was entrusted by Technical Committee EH/1, Acoustics, to Subcommittee EH/1/6, Building acoustics, which has the responsibility to: aid enquirers to understand t
4、he 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 and promulgate them in the UK. A list of organizations represented on this su
5、bcommittee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications with their corresponding European publications. The British Standards which
6、implement these international European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catalogue. A British Standard does not purport to include all the
7、 necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii,
8、the EN ISO title page, page 2, the ISO title page, pages ii to iv, pages 1 to 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. Amendments is
9、sued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 11654:1997 BSI 03-2000i Contents Page National forewordInside front cover Foreword2 Forewordiii Text of ISO 116541 Licensed Copy: sheffield
10、un sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 11654 April 1997 ICS 91.120.20 Descriptors:
11、See ISO document English version Acoustics Sound absorbers for use in buildings Rating of sound absorption (ISO 11654:1997) Acoustique Absorbants pour lutilisation dans les btiments Evaluation de labsorption acoustique (ISO 11654:1997) Akustik Schallabsorber fr die Anwendung in Gebuden Bewertung der
12、 Schallabsorption (ISO 11654:1997) This European Standard was approved by CEN on 1997-03-19. 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
13、 lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. The European Standards exist in three official versions (English, French, German). A version in any other language made by translation under the re
14、sponsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Nor
15、way, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1997 CEN All rights of exploitation in any form and by any means reserved wo
16、rldwide for CEN national Members. Ref. No. EN ISO 11654:1997 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11654:1997 BSI 03-2000 2 Foreword The text of the International Standard ISO 11654:1997 has been prepared by Technical Comm
17、ittee ISO/TC 43 “Acoustics” in collaboration with Technical Committee CEN/TC 126 “Acoustic properties of building products and of buildings”, the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text
18、 or by endorsement, at the latest by October 1997, and conflicting national standards shall be withdrawn at the latest by October 1997. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Au
19、stria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 11654:1997 was approved by CEN as a European Standard withou
20、t any modification. NOTENormative references to International Standards are listed in Annex ZA (normative). Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncon
21、trolled Copy, (c) BSI EN ISO 11654:1997 ii BSI 03-2000 Contents Page Forewordiii 1Scope1 2Normative references1 3Definitions1 4Calculation2 5Presentation of results3 Annex A (informative) Examples of calculations of w with and without a shape indicator4 Annex B (informative) Classification of sound
22、absorbers5 Annex C (informative) Example of a standardized diagram for !s values6 Annex ZA (normative) Normative references to international publications with their relevant European publicationsInside back cover Figure 1 Reference curve for evaluation of weighted sound absorption coefficient, w2 Fi
23、gure 2 Specification of depth of construction3 Figure A.1 Example of a calculation of w (w = 0,60)4 Figure A.2 Example of a calculation of w w = 0,60(M)4 Figure B.1 Illustration of the reference curve limiting the different sound absorption classes5 Table B.1 Sound absorption classes5 Descriptors: A
24、coustics, acoustic absorption, buildings, sound absorbers, tests, estimation, sound absorption coefficient, rules of calculation, acoustic measurements. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11654:1997 BSI 03-2000iii Forewor
25、d ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technica
26、l committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of ele
27、ctrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 11654 was prepa
28、red by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics. Annex A, Annex B and Annex C of this International Standard are for information only. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed C
29、opy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11654:1997 BSI 03-20001 1 Scope 1.1 This International Standard specifies a method by which the frequency-dependent values of the sound absorption coefficient can be converted into a single number
30、. Before this is done, the one-third-octave band values of the sound absorption coefficient measured in accordance with ISO 354 are converted into octave bands. In Annex B a classification method, based on these single numbers, is given for information. 1.2 The single-number rating specified in this
31、 International Standard can be used to formulate requirements and to describe acoustical properties of sound-absorbing products to be used for routine applications in normal offices, corridors, class rooms, hospitals, etc. The rating is not appropriate when the products are to be used in qualified e
32、nvironments requiring careful acoustical design by expertise. In such cases, only complete sound absorption data as a function of frequency are satisfactory. This International Standard is not applicable unless the applications cover the whole frequency range of the reference curve. If only a part o
33、f this range is of interest, it may be more appropriate to look for products with a good sound absorption within this range only. The shape indicators described in this International Standard give some guidance in identifying such products which may have a relatively low single number but a much hig
34、her potential if a more restricted frequency range is considered. Such products should be judged from the complete sound absorption curve. As the rating curve in this International Standard has as a lower limit the 250 Hz octave band, the rating is not appropriate below this frequency. If such low f
35、requencies are of interest, reference must be made to the complete sound absorption curve. This International Standard is, in principle, applicable to all building products for which the sound absorption coefficient has been determined in accordance with ISO 354. It is, however, often not suitable f
36、or application to single items, such as chairs, baffles, etc., nor is it applicable to road barriers and road surfaces. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of public
37、ation, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registe
38、rs of currently valid International Standards. ISO 354:1985, Acoustics Measurement of sound absorption in a reverberation room. ISO 354:1985/Amd. 1:, Annex D: Test specimen mountings for sound absorption tests1). 3 Definitions For the purposes of this International Standard, the following definition
39、s apply. 3.1 practical sound absorption coefficient, p frequency-dependent value of the sound absorption coefficient which is based on measurements on one-third-octave bands in accordance with ISO 354 and which is calculated in octave bands in accordance with this International Standard NOTEFor the
40、value in the ith octave band, the notation pi is used. 3.2 weighted sound absorption coefficient, w single-number frequency-independent value which equals the value of the reference curve at 500 Hz after shifting it as specified in this International Standard 3.3 shape indicators, L, M, H indication
41、 showing practical sound absorption coefficients exceeding those of the shifted reference curve by 0,25 or more in different frequency ranges as specified in this International Standard NOTENegative deviations (values under the reference curve) are not considered as they are already maximized to 0,1
42、 in the curve-shifting procedure. 1) To be published. Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11654:1997 2 BSI 03-2000 4 Calculation 4.1 Practical sound absorption coefficient Calculate the practical sound absorption coefficie
43、nt, pi, for each octave band i from the arithmetic mean value of the three one-third-octave sound absorption coefficients, i1, i2, and i3 within the octave: The mean value is calculated to the second decimal and rounded in steps of 0,05 and maximized to pi= 1,00 for rounded mean values 1,00. NOTEx,y
44、2 is rounded to x,y0 and x,y3 is rounded to x,y5. x,y7 is rounded to x,y5 and x,y8 is rounded to x,y + 0,1. EXAMPLE 0,92 is rounded to 0,90. 4.2 Weighted sound absorption coefficient Use the pi values to calculate the weighted sound absorption coefficient w from the reference curve shown in Figure 1
45、. Shift the reference curve in steps of 0,05 towards the measured value until the sum of the unfavourable deviations is less than or equal to 0,10. An unfavourable deviation occurs at a particular frequency when the measured value is less than the value of the reference curve. Only deviations in the
46、 unfavourable direction shall be counted. The weighted sound absorption w is defined as the value of the shifted reference curve at 500 Hz. Examples of calculations of w are given in Annex A. 4.3 Shape indicators Whenever a practical sound absorption coefficient pi exceeds the value of the shifted r
47、eference curve by 0,25 or more, one or more shape indicators shall be added, in parentheses, to the w value. If the excess absorption occurs at 250 Hz, use the notation L. If the excess absorption occurs at 500 Hz or 1 000 Hz, use the notation M. If the excess absorption occurs at 2 000 Hz or 4 000
48、Hz, use the notation H. NOTEA shape indicator means that the sound absorption coefficient at one or more frequencies is considerably higher than the values of the shifted reference curve and that the interested parties are encouraged to look at the complete sound absorption coefficient curve. Freque
49、ncy Value 250 Hz 0,80 500 Hz 1,00 1 000 Hz 1,00 2 000 Hz 1,00 4 000 Hz 0,90 Figure 1 Reference curve for evaluation of weighted sound absorption coefficient, w Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 03:06:16 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 11654:1997 BSI 03-20003 5 Presentation of results Results shall be given in the formats specified in 5.1 to 5.3. Depending on the purpose of the presentation, one or more of the descriptors can be omitted, unless otherwise specified.