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1、 Reference number ISO 10848-2:2006(E) ISO 2006 INTERNATIONAL STANDARD ISO 10848-2 First edition 2006-04-01 Acoustics Laboratory measurement of the flanking transmission of airborne and impact sound between adjoining rooms Part 2: Application to light elements when the junction has a small influence
2、Acoustique Mesurage en laboratoire des transmissions latrales du bruit arien et des bruits de choc entre des pices adjacentes Partie 2: Application aux lments lgers lorsque la jonction a une faible influence ISO 10848-2:2006(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordan
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5、. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2006 All rights reserved. Unless otherwise specified, no part of this publ
6、ication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Gene
7、va 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2006 All rights reserved ISO 10848-2:2006(E) ISO 2006 All rights reserved iii Contents Page Foreword iv 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 2 4 Measur
8、ing equipment. 3 5 Test arrangement 3 5.1 Requirements for the laboratory. 3 5.2 Installation of the test element 4 5.3 Verification procedure for a light flanking element that is structurally independent of a separating element. 7 5.4 Shielding technique used in the case of airborne excitation. 8 6
9、 Test procedures 8 7 Precision 8 8 Expression of results . 8 9 Test report . 9 Annex A (informative) Measurement of Dn,f,I with intensity technique. 10 Bibliography. 11 ISO 10848-2:2006(E) iv ISO 2006 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwid
10、e 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 technical committee has been established has the right to be represented on that
11、 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 electrotechnical standardization. International Standards are drafted in ac
12、cordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard req
13、uires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 10848-2 was prepared by the
14、European Committee for Standardization (CEN) Technical Committee CEN/TC 126, Acoustic properties of building elements and of buildings, in collaboration with Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics, in accordance with the Agreement on technical cooperation bet
15、ween ISO and CEN (Vienna Agreement). This first edition cancels and replaces EN 20140-9 and ISO 140-12. ISO 10848 consists of the following parts, under the general title Acoustics Laboratory measurement of the flanking transmission of airborne and impact sound between adjoining rooms: Part 1: Frame
16、 document Part 2: Application to light elements when the junction has a small influence Part 3: Application to light elements when the junction has a substantial influence The following part is under preparation: Part 4: Application to all other cases INTERNATIONAL STANDARD ISO 10848-2:2006(E) ISO 2
17、006 All rights reserved 1 Acoustics Laboratory measurement of the flanking transmission of airborne and impact sound between adjoining rooms Part 2: Application to light elements when the junction has a small influence 1 Scope ISO 10848 specifies measurement methods to be performed in a laboratory t
18、est facility in order to characterize the flanking transmission of one or several building components. The measured quantities may be used to compare different products, or to express a requirement, or as input data for prediction methods, such as EN 12354-1 and EN 12354-2. This part of ISO 10848 is
19、 specifically referred to in ISO 10848-1:2006, 4.4, as being a supporting part of the frame document. This part of ISO 10848 applies to light elements such as suspended ceilings, access floors, light uninterrupted faades or floating floors. The transmission from one room to another can be simultaneo
20、us through the test element and via the plenum, if any. With measurements according to this part of ISO 10848, the total sound transmission is measured, and it is not possible to separate the two kinds of transmission. The measured quantities Dn,f and Ln,f depend on the actual dimensions of the test
21、 specimen. A light element is defined in ISO 10848-1:2006, Clause 3. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced do
22、cument (including any amendments) applies. ISO 140-2, Acoustics Measurement of sound insulation in buildings and of building elements Part 2: Determination, verification and application of precision data ISO 140-3:1995, Acoustics Measurement of sound insulation in buildings and of building elements
23、Part 3: Laboratory measurements of airborne sound insulation of building elements ISO 140-6:1998, Acoustics Measurement of sound insulation in buildings and of building elements Part 6: Laboratory measurements of impact sound insulation of floors ISO 354, Acoustics Measurement of sound absorption in
24、 a reverberation room ISO 717-1, Acoustics Rating of sound insulation in buildings and of building elements Part 1: Airborne sound insulation ISO 10848-2:2006(E) 2 ISO 2006 All rights reserved ISO 717-2, Acoustics Rating of sound insulation in buildings and of building elements Part 2: Impact sound
25、insulation ISO 10848-1:2006, Acoustics Laboratory measurement of the flanking transmission of airborne and impact sound between adjoining rooms Part 1: Frame document 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 normalized flanking level d
26、ifference Dn,f difference in the space and time average sound pressure level produced in two rooms by one or more sound sources in one of them, when the transmission only occurs through a specified flanking path NOTE Dn,f is normalized to an equivalent sound absorption area (A0) in the receiving roo
27、m and is expressed in decibels: n,f12 0 10 lgdB A DLL A = (1) where L1 is the average sound pressure level in the source room, in decibels; L2 is the average sound pressure level in the receiving room, in decibels; A is the equivalent sound absorption area in the receiving room, in square metres; A0
28、 is the reference equivalent sound absorption area, in square metres; A0 = 10 m2. ISO 10848-1:2006 3.2 normalized flanking impact sound pressure level Ln,f space and time average sound pressure level in the receiving room produced by a standard tapping machine operating at different positions on a t
29、ested floor in the source room, when the transmission only occurs through a specified flanking path NOTE Ln,f is normalized to an equivalent sound absorption area (A0) in the receiving room and is expressed, in decibels: n,f2 0 10 lgdB A LL A =+ (2) where L2 is the average sound pressure level in th
30、e receiving room, in decibels; A is the equivalent sound absorption area in the receiving room, in square metres; A0 is the reference equivalent sound absorption area, in square metres; A0 = 10 m2. ISO 10848-1:2006 3.3 plenum space whole of the void below an access floor or above a suspended ceiling
31、 in both rooms in the test facility ISO 10848-2:2006(E) ISO 2006 All rights reserved 3 4 Measuring equipment The equipment shall fulfil the requirements given in ISO 10848-1:2006, Clause 5. 5 Test arrangement 5.1 Requirements for the laboratory 5.1.1 General The general requirements for test specime
32、ns and test rooms given in ISO 10848-1:2006, Clause 6 shall be fulfilled. Further requirements for this part of ISO 10848 are stated in the following subclauses. Facilities for different kinds of test specimens are shown in Figures 1 to 4. 5.1.2 Construction of the test facility The rooms shall be o
33、n the same level, except for the faade testing where the rooms may be placed one on top of the other. For access floors and suspended ceilings, the ground plan of the test facility shall be rectangular. When the rooms are side by side, a vibration break shall be provided between the two rooms in ord
34、er to ensure that structure-borne transmissions through the test facility are negligible (see Figure 1). When a plenum is used, the reverberation time of each room might be affected by sound transmission back from the other test room. In such cases, a suitable impervious plenum barrier shall be inst
35、alled between the edge of the dividing wall and the bottom wall of the plenum during the reverberation time measurements. 5.1.3 Dimensions of the test facility The width of the test facility shall be 4,5 m 0,5 m and the internal height of the source and receiving rooms shall be at least 2,3 m. The v
36、olume V of each room shall be at least 50 m3. It is recommended that the dividing wall be positioned such that the volumes of source and receiving room differ by at least 10 % when the test element is in position. The minimum depth in both rooms shall be 3,5 m. 5.1.4 Dividing wall The dividing wall
37、divides the test facility into source and receiving room. The dividing wall shall be mounted in such a way that it is not loading the element. The gap between the dividing wall and the element shall be sealed with a flexible material. The thickness of the wall shall be less than 200 mm or tapered to
38、 200 mm (see for example Figure 1). The tapering between the widest part of the wall and the element shall be achieved by means of an angle not exceeding 45. The construction of the dividing wall shall be such that Dn,f,max is 10 dB higher than the Dn,f of any element which is likely to be tested. I
39、n cases where there is a plenum, for checking the airborne sound insulation of the facility, a suitable plenum barrier of construction similar to the dividing wall may be installed between the edge of the dividing wall and the wall of the test facility, without the element. In cases where there is n
40、o plenum, a suitable construction, for example a lining of the internal face of the test element, could be necessary to determine Dn,f,max. 5.1.5 Plenum height For access floors, the height as measured from the surface of the access floor to the surface of the floor of the test facility shall be eit
41、her 0,3 m or, if this is not possible, then the nearest possible value shall be used. Other heights may be tested if they are intended to be used in practice. ISO 10848-2:2006(E) 4 ISO 2006 All rights reserved For suspended ceilings, the height as measured from the lower surface of the ceiling to th
42、e lower surface of the test facility ceiling shall be between 0,7 m and 0,8 m. Other heights may be tested if they are intended to be used in practice. 5.1.6 Plenum lining One sidewall of the plenum and both endwalls of the plenum shall be lined with suitable sound-absorbing material. This material
43、shall have such properties that when tested as a plane absorber in accordance with ISO 354, it has sound absorption coefficients not less than those shown in Table 1. Table 1 Octave-band centre frequency, Hz 125 250 500 1 000 2 000 4 000 Sound absorption coefficient, s 0,65 0,80 0,80 0,80 0,80 0,80
44、For the other sidewalls and the floor, the sound absorption coefficient shall be less than 0,10 at all frequencies given in the table. The thickness of the lining shall not exceed 150 mm. In cases where there is no plenum, attention shall be given to avoiding an important outside airborne transmissi
45、on path between the two parts of the test element through the hall where the test facility is installed. NOTE Typically, the ratio of the volume of the hall (in cubic metres) to its reverberation time (in seconds) should be larger than 500 m3/s. 5.2 Installation of the test element 5.2.1 Installatio
46、n of access floors The area of a floor shall be equal to the area given by the length and width of the test facility. The floor components shall be representative of those used in practice in actual field installations. The floor shall be installed in accordance with the recommended practice of the
47、manufacturer or with the recommended practice of an installation standard. For an example, see Figure 1. 5.2.2 Installation of suspended ceilings The detail of the joint between the ceiling and the top of the dividing wall is of critical importance and care shall be taken to simulate actual field co
48、nditions. The area of a continuous ceiling shall be equal to the area given by the length and width of the test facility. For a ceiling with a break at the dividing wall, it may be necessary to add additional capping to the top of the dividing wall to complete the junction. The area of a discontinuo
49、us ceiling shall then be equal to the area given by the length and width of the test facility less the area of the capping on the top of the dividing wall. The ceiling components shall be representative of those used in practice in actual field installations. The ceiling shall be installed in accordance with the recommended practice of the manufacturer or with the recommended practice of an installation standard. ISO 10848-2:2006(E) ISO 2006 All rights reserved 5 In cases where nor
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