BS EN 16487-2014 Acoustics Test code for suspended ceilings Sound absorption《声学 吊顶的测试代码 吸声》.pdf

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1、BSI Standards PublicationBS EN 16487:2014Acoustics Test code forsuspended ceilings SoundabsorptionBS EN 16487:2014 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN 16487:2014.The UK participation in its preparation was entrusted to TechnicalCommittee EH/1/6, Buil

2、ding acoustics.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2014. Published

3、by BSI StandardsLimited 2014ISBN 978 0 580 79998 3ICS 91.060.30; 91.120.20Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 30 November 2014.Amendments issued since

4、publicationDate Text affectedBS EN 16487:2014EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 16487 November 2014 ICS 91.060.30; 91.120.20 English Version Acoustics - Test code for suspended ceilings - Sound absorption Acoustique - Code dessai des plafonds suspendus - Absorption acoustique Akust

5、ik - Prfvorschrift fr Unterdecken - SchallabsorptionThis European Standard was approved by CEN on 27 September 2014. 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 an

6、y alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other langua

7、ge made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark,

8、 Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR

9、 STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2014 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 16487:2014 EBS EN 16487:2014EN 164

10、87:2014 (E) 2 Contents Page Foreword 3 Introduction .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Test arrangements .6 4.1 Test specimens 6 4.1.1 Plane absorbers .6 4.1.2 Discrete sound absorbers . 10 4.2 Temperature and humidity . 12 4.2.1 Choice of test conditions . 12 4.2.2 R

11、elative humidity 12 4.2.3 Check of test conditions 13 4.3 Rules for sampling 13 5 Measurement of reverberation time 13 5.1 Microphones and microphone positions . 13 5.2 Empty room measurement 13 6 Measurement uncertainty 13 6.1 General . 13 6.2 Uncertainty 13 7 Test report . 15 Annex A (informative)

12、 Round Robin Test performed for the development of this Test Code standard . 16 Bibliography . 18 BS EN 16487:2014EN 16487:2014 (E) 3 Foreword This document (EN 16487:2014) has been prepared by Technical Committee CEN/TC 126 “Acoustic properties of building elements and of buildings”, the secretaria

13、t of which is held by AFNOR. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights. This European Standard shall be given the status of a national standard,

14、 either by publication of an identical text or by endorsement, at the latest by May 2015, and conflicting national standards shall be withdrawn at the latest by May 2015. This standard is a complement to the European Standard EN ISO 354 and is not intended to replace it. The complement includes more

15、 stringent rules, narrower tolerances and new, additional requirements to be used for compilation of data for the CE marking of suspended ceilings. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European

16、Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia

17、, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 16487:2014EN 16487:2014 (E) 4 Introduction Product standard EN 13964 “Suspended ceilings Requirements and test methods” provides information on how to mark or label products for the CE marking. When the suspended ceiling has a sound

18、absorption property, its sound absorption coefficients should be established by testing according to EN ISO 354. The measured sound absorption coefficients are calculated into the practical sound absorption coefficient , in octave bands and into a single number value wwith shape indicator, in accord

19、ance with EN ISO 11654. The single number value wis used for the CE marking. Measurement of sound absorption coefficients according to EN ISO 354 is through earlier RRTs (Round Robin Tests) known to generate large spread in results from different laboratories. This is not acceptable, either from a c

20、ompetition point of view or from an end-user perspective. Therefore, CEN/TC 126 “Acoustic properties of building elements and of buildings” decided to set up a working group, WG 11 “Test Code for suspended ceilings”, with the scope to improve reproducibility by developing a Test Code. One part of th

21、is work was to organize a Round Robin Test (RRT) for sound absorption measurements. BS EN 16487:2014EN 16487:2014 (E) 5 1 Scope This European Standard specifies additional necessary information on how to carry out efficiently and under standardized conditions the determination of the sound absorptio

22、n coefficients according to EN ISO 354 “Measurement of sound absorption in a reverberation room”. It specifies the additional requirements of the sound absorption measurements and the operating and mounting conditions that should be used for the test. Observe that all demands in EN ISO 354 still sho

23、uld be fulfilled. The results obtained are used for design calculations with respect to room acoustics and to convert frequency-dependent sound absorption coefficients into a weighted sound absorption coefficient w, according to EN ISO 11654. This European Standard is applicable for the compile of t

24、he single number rating w, to express the sound absorption performance of suspended ceiling membranes in CE marking and labelling according to EN 13964. This European Standard is not applicable for suspended ceiling kits according to EN 13964. 2 Normative references The following documents, in whole

25、 or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 13964:2014, Suspended ceilings - Requ

26、irements and test methods EN ISO 354:2003, Acoustics - Measurement of sound absorption in a reverberation room (ISO 354:2003) EN ISO 11654, Acoustics - Sound absorbers for use in buildings - Rating of sound absorption (ISO 11654) NOTE Due to the strong links between this standard and EN ISO 354:2003

27、 and EN 13964:2014, references to relevant paragraphs are given where applicable 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 test object designation of a sound absorbing product being a part of a test specimen 3.2 test specimen designatio

28、n of all the test objects included in a measurement 3.3 area of the test specimen S area of the test objects creating the test specimen Note 1 to entry The area is expressed in square metres with two decimals. SOURCE: EN ISO 354:2003, 3.8 modified by replacing “floor or wall” with “test objects” and

29、 by deleting the second note related to test specimen surrounded by a structure 3.4 suspended ceiling ceiling hung by a suspension from or by a directly fixed substructure or perimeter trim to the load bearing structure (floor, roof, beam and walls) at a distance from the floor or roof above SOURCE:

30、 EN 13964:2014, 3.1.2 BS EN 16487:2014EN 16487:2014 (E) 6 3.5 ceiling membrane exposed surface of the ceiling facing the room, excluding any exposed substructure SOURCE: EN 13964:2014, 3.3.1 3.6 ceiling membrane component product forming part of the ceiling membrane (e.g. a tile or plank) SOURCE: EN

31、 13964:2014, 3.3.2 3.7 suspended ceiling kit set of at least two separate components that need to be put together to be installed permanently in the works SOURCE: EN 13964:2014, 3.1.4 modified by deleting the sentence after the definition and the notes 3.8 plane absorbers horizontal objects (ceiling

32、 membrane components) creating a continuous surface (ceiling membrane) 3.9 baffles discrete sound absorbers installed as vertical objects (ceiling membrane components) at a certain distance from each other Note 1 to entry: see Figure 1 Figure 1 Example for a baffle (other design systems may exist) 4

33、 Test arrangements 4.1 Test specimens 4.1.1 Plane absorbers 4.1.1.1 Size and mounting details for test specimen, test objects and mounting fixture 4.1.1.1.1 The test specimen shall have an area as close to 10,80 m2as possible. (EN ISO 354:2003, 6.2.1.1) BS EN 16487:2014EN 16487:2014 (E) 7 4.1.1.1.2

34、The size of the test objects should be 0,6 m 0,6 m and if not available the closest possible size in the product range. 4.1.1.1.3 Test objects shall be mounted butt together with no seal in the joints. The mounting of the test objects shall be described in the test report. The area S of the test spe

35、cimen shall be the actual size of the plane consisting of the test objects butt together, Figure 2. 4.1.1.1.4 The exposed side of the suspended ceiling shall be at the same level as the top of the mounting fixture and the joint between the test specimen and the mounting fixture shall be covered by a

36、 tape, Figure 2, Detail A, or a flexible sealant. Key 1 measure for calculation of S 2 tape Figure 2 Dimension to be used for calculation of specimen area S. Detail A showing application of tape over joint BS EN 16487:2014EN 16487:2014 (E) 8 4.1.1.1.5 The edges of the specimen and the mounting fixtu

37、re shall not be parallel to the nearest edge of the room; an angle of at least 10 should be aimed at. (EN ISO 354:2003, 6.2.1.2) 4.1.1.1.6 Mounting fixture shall be of solid, preferably wooden material, without any cavities and with a surface density of at least 20 kg/m2. (EN ISO 354:2003, B.4) NOTE

38、 In order to have a mounting fixture, flexible to small variations of the specimen size, the so called “wind mill solution” might be an alternative to a fixed-size mounting fixture, Figure 3. Figure 3 Mounting fixture of wind mill type 4.1.1.1.7 Open joints within the mounting fixture shall be seale

39、d to prevent air leakage between the enclosed space and the outside. Any open cavity inside the fixture shall also be sealed, to avoid sound absorption in the enclosed space in accordance to EN ISO 354:2003, B.4. 4.1.1.2 Type of plane absorber mounting 4.1.1.2.1 Type A mounting according to EN ISO 3

40、54:2003, B.2 4.1.1.2.1.1 This mounting is used for products that are attached directly against a hard surface or substructure by adhesives or mechanical fasteners, which do not leave any thin air space between the product and the surface to which it is attached. 4.1.1.2.1.2 The perimeter edge of the

41、 test specimen shall be sealed or covered with the mounting fixture as described in 4.1.1.1 to prevent the edges from absorbing sound. However if the edges of the test specimen are exposed when the products are normally installed in an actual application, then the edges of the test BS EN 16487:2014E

42、N 16487:2014 (E) 9 specimen shall not be sealed or covered by any mounting fixture during a test. If the edges are not sealed or covered, the area of the edges shall be included in calculating the test specimen area. The treatment of the edges of the test specimen shall be described in the test repo

43、rt. If the area of the specimen edges was included in the calculation of test specimen area, this shall be noted in the test report. 4.1.1.2.2 Type B mounting according to EN ISO 354:2003, B.3 4.1.1.2.2.1 This mounting is used for products that are glued directly to a hard surface with an acoustic p

44、anel adhesive, an application which normally leaves a thin airspace between the product and the surface to which it is adhered. 4.1.1.2.2.2 The perimeter edge of the test specimen shall be sealed or covered with the mounting fixture as described in 4.1.1.1 to prevent the edges from absorbing sound.

45、If there are no instructions how thick to apply the dabs of the adhesive, a 3 mm airspace shall be used. In order to secure the air space, shims of 3 mm thickness of size 25 mm by 25 mm shall be located at the 4 corners of each test object. 4.1.1.2.2.3 If a gypsum board is used as the hard surface i

46、t shall remain in the reverberation room also during the measurement of the empty room reverberation. 4.1.1.2.3 Type E mounting according to EN ISO 354:2003, B.4 4.1.1.2.3.1 This mounting is used for products that are suspended from a hard surface creating an important air space in between. Accordin

47、g to EN ISO 11654, it is recommended to make at least one measurement with an overall depth of construction of 200 mm, which also shall be used for the compilation of data for CE marking, Figure 2. 4.1.1.2.3.2 For the purpose of CE marking it is not allowed to make measurements with the specimen emb

48、edded in the floor, having the surface of the specimen at the same level as the floor and the air-space down in the floor. 4.1.1.2.3.3 Grids shall not be used to cover the joints between test objects. Test objects with exposed edges due to absence of grids during measurement, should be avoided, if o

49、ther edge types are available and have the same acoustic properties. NOTE If grids for some reason are included in the measurement, the figures received will represent a suspended ceiling kit and not a ceiling membrane according to EN 13964. 4.1.1.2.3.4 Test objects might be supported in one direction by a substructure with a width 30 mm, a height 50 mm and a centre distance of approx. 0,6 m, Figure 4. Key * Substructure profiles of any shape and material with width 30 mm and height 50 mm. * Deflection of the test specimen at any point