《ISO-140-10-1991.pdf》由会员分享，可在线阅读，更多相关《ISO-140-10-1991.pdf（11页珍藏版）》请在三一文库上搜索。
1、INTERNATIONAL STANDARD IS0 140-I 0 First edition 1991-12-15 Acoustics - Measurement of sound insulation in buildings and of building elements - Part IO: Laboratory measurement of airborne sound insulation of small building elements ACousfiQue - Mesurage de Iisolafion acoustique des immeubles et des
2、BICmenfs de construction - Partie 10: Mesurage en laborafoire de /isolation au bruit ahrien de petiis dlments de consfrucfion Reference number IS0 140-10:1991(E) IS0 140-10:1991(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodie
3、s (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 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 committee. International organizations,
4、 govern- mental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulate
5、d to the member bodies for voting Publication as an Inter- national Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 140-10 was prepared by Technical Committee ISO/TC 43, Acoustics, Sub-Committee SC 2, Building acoustics. IS0 140 consists of
6、 the following parts, under the general title Acoustics - Measurement of sound insulafion in buildings and of build- ing elements: - Part 1: Requirements for laboratories - Part 2: Determination, verilication and application of precision data - Part 3: Laboratory measurements of airborne sound insul
7、ation of building elements - Part 4: Field measurements of airborne SOWJd insulation between rooms - Part 5: Field measurements of airborne sound insulation of facade elements and facades - Part 6: Laboratory measurements of impact sound insulation of noors - Part 7: Field measurements of impact sou
8、nd insulation of floors - Part 8: Laboratory measurements of the reduction of transmitted impact noise by f7oor coverings on a standard f7oor Q IS0 I%31 All rights reserved. No par1 of this publication may be reproduced or utlllzed In any form or by any means, electronic or mechanical, including pho
9、tocopylng and microfllm, without permission In writing from the publisher. lnternatlonal Organization for Standardization Case Postale 56 l Cl-l-121 1 Geneve 20 l Switzerland Prlnted in Switzerland ii IS0 140-10:1991(E) - Part 9: Laboratory measurement of room-to-room airborne sound insulation of a
10、suspended ceiling with a plenum above it - Part lo.- Laboratory measurement of airborne sound insulation of small building elements Annexes A, B and C form an integral part of this part of IS0 140. . . . III INTERNATIONAL STANDARD IS0 140-10:1991(E) Acoustics - Measurement of sound insulation in bui
11、ldings and of building elements - Part 10: Laboratory measurement of airborne sound insulation of small building elements 1 Scope This part of IS0 140 gives a laboratory method of measuring airborne sound insulation under diffuse field conditions of such small building elements as are defined below.
12、 It is intended that the results obtained will be used to develop building elements with appropriate acoustical properties, to classify such elements ac- cording to their sound insulation properties and to estimate their influence on the sound insulation of partition constructions in buildings. This
13、 part of IS0 140 applies to building elements, excluding windows and doors, with an area of less than 1 m and which occur in a certain number of discrete sizes with well-defined lateral dimensions and which transmit sound between two adjacent rooms or between one room and the open air inde- pendentl
14、y of the adjoining building elements. Some examples of equipment covered by this part of IS0 140 are transfer air devices airing panels (ventilators) outdoor air intakes electrical raceways (cable ducts) transit sealing systems The method given is not primarily intended for components that constitut
15、e part of an integrated unit for which the associated sound transmission might depend on an interplay of components. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 140. At the time of publication, the
16、 editions indicated were valid. All standards are subject to revision, and parties to agreements based on this part of IS0 140 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and IS0 maintain registers of currently v
17、alid Inter- national Standards. IS0 140-1:1990, Acoustics - Measurement of sound insulafion in buildings and of building elements - Part 1: Requirements For laborafories. IS0 140-3:1978, Acoustics - Measurement of sound insulation in buildings and of building elements - Pat-i 3: Laboratory measureme
18、nts of airborne sound insulation of building elements. IS0 717-1:1982, Acouslics - Rating of sound insu- lation in buildings and of building elements - Part I: Airborne sound insulation in buildings and of interior building elements. IS0 717-3:1982, Acoustics - Rating of sound insu- lation in buildi
19、ngs and of building elements - Part 3: Airborne sound insulafion of facade elements and facades. 1 IS0 140-10:1991(E) 3 Definition For the purposes of this part of IS0 140, the following definition applies. It is convenient to express this sound insulation in terms of the element-normalized level di
20、fference according to equation (1). The flanking transmission expressed as an equivalent nn,e is denoted by D n,e.F. 3.1 element-normalized level difference: For the purposes of this test method, the element- normalized level difference is given by equation (1). It is denoted by Dn,+ and is expresse
21、d in decibels. If the measured value of the element-normalized level difference for a test object is less than D n,e,F- 10 dB, the indirectly transmitted sound is considered nealiaible. If the measured value is D,=L,-L,+ IOlg (A,/A)dB where (1 larger than or equal to DneF- 10 dB, the measured value
22、shall be corrected using the procedure speci- Red in annex A. L, is the average sound pressure level in the NOTE 1 Difficulties with an unsatisfactorily low margin source room, in decibels; between the flanking transmission and the transmission via the test object can be avoided by increasing the L2
23、 is the average sound pressure level in the number of test objects inserted in the partition (see receiving room, in decibels: 6.3.3). A, is the reference area, in square metres (for the laboratory, A, = 10); 6 Installation and operation of test objects A is the equivalent absorption area in the re-
24、 ceiving room, in square metres. 6.1 General 4 Equipment The measurement equipment shall comply with the requirements given for equipment in IS0 d40-3. As the sound insulation of small building elements depends on their dimensions, reliable values can be obtained only by testing every actual size. 6
25、.2 Mounting of test objectifs 5 Laboratory requirements 5.1 Rooms Ensure that the test object is installed in a manner representative of field practice with a careful simu- lation of normal connections and sealing conditions at the perimeter and at joints within the unit. Laboratory test facilities
26、shall comply with the re- quirements given for laboratory test facilities in IS0 140-l. If the test object is intended to be openable. install it for test so that it can be opened and closed in the normal manner. Open and close it at least ten times 5.2 Partitions immediately befor testing. The test
27、 object is much smaller than the available test opening, A partition of sufficiently high sound insulation shall be built in the test opening; the ob- ject shall be placed in this partition. The sound transmitted through this partition and any other in- direct path shall be either: In order to achie
28、ve a realistic wall thickness around the element, it might be practical or necessary ei- ther to increase or decrease the thickness of the partition wall in the area around the element. Rules for increasing or decreasing the thickness locally are given in annex 8. a) negligible compared with the sou
29、nd transmitted through the test object, 6.3 Location of test objects 6.3.1 Mounting positions or, if this condition cannot be filled, b) the measured values shall be corrected for the influence of flanking transmission. The flanking transmission shall be determined by measuring the apparent sound in
30、sulation of the partition wall inserted in the test opening. This measurement can be carried out before making the opening for the test object or with plates having a high sound insulation on both sides of the opening. When a small building unit is mounted near one or more reflecting planes, the sou
31、nd transmission may differ appreciably from that obtained when the unit is mounted through a partition but away from any adjoining room surface. Therefore, mount the equipment to be tested through the partition in pos- itions representative of normal usage. On devices which can be used at several di
32、fferent positions, carry out measurements at least with an edge pres- ent in both rooms. 2 IS0 140-10:1991(E) For transfer air devices and electrical raceways which are normally mounted near an adjoining re- flective wall, the specific mounting positions are stated in 6.4 and 6.5. For other types of
33、 equipment, the rules given in 6.3.1.1 to 6.3.1.3 shall be observed. 6.3.3 Number of small elements To achieve a better signal-to-noise ratio, simultane- ous measurements can be performed on more than one test object. When performing simultaneous measurements, replace equation (1) by 6.3.1.1 Equipme
34、nt used away from walls L C?,85 m will be sufficient if several elements are tested at the same time. where J-Y ne is the element-normalized level difference of the individual element; II is the number of units installed. 6.3.1.2 Equipment used near an edge Locate equipment mounted through a partiti
35、on and normally located near an adjoining wall, floor or ceiling, and away from a corner, at least I,00 m (0,85 m if several elements are tested at the same time) from the nearest wall not being a part of the edge. Unless otherwise specified by the manufac- turer, locate the edge of the equipment 0,
36、l m from the edge of the wall. 6.3.1.3 Equipment used near a corner Locate equipment mounted through a partition and normally located near a corner at the distance from a corner recommended by the manufacturer. If natural corners or edges are not available in the test opening, it is essential to sim
37、ulate such mount- ing conditions by means of attaching reflective pan- els at right angles to the partition wall, as illustrated in annex C. Ensure that the simulation takes place both in the receiving and the source room 6.3.2 Number of positions The building elements are small and, in combination
38、with the spatial variations of the sound fields, this leads to a significant position dependency. Use preferably three positions for the mounting of the test object in the partition wall. These positions shall either a) be simulated as described in 6.3.1, or b) they shall be located at least 1.2 m f
39、rom each other. NOTES 6.4 Installation of transfer air devices Install the test objects in a manner representative of field practice and in typical locations with respect to the room surfaces as given in the installation rules above. Mount transfer air devices which are normally mounted near an adjo
40、ining ceiling in a position close to a reflective surface at right angles to the partition, but at least I,00 m (0,85 m if several elements are tested at the time) from any corner. The distance between the closest pat-l of the device and the adjoining surface shall be 0,l m. Access- ories normally u
41、sed shall be included. Position and fix these accessories in accordance with the manu- facturers directions. If the device is provided with some air-flow control, ensure that the equipment is operated in a specified manner typical of normal usage. If the specified manner is not the fully open condit
42、ion, include this condition in the test sequence. If the device is continuously adjustable to various wall thicknesses, ensure that the tests comprise at least the two extreme wall thicknesses for which the device is stated to be suitable. 6.5 lnstalfation of electrical raceways Install the test obj
43、ect in a manner representative of field practice and in typical locations with respect to the room surfaces. Mount raceways which are normally mounted directly on walls on a reflective surface at right angles to the partition and in ac- cordance with the manufacturers directions. Include accessories
44、 normally used. Install these access- ories in accordance with the manufacturers in- structions. 2 A position dependency also exists for apparently equivalent corners which makes it necessary to use more than one corner to achieve an acceptable precision. 3 When simulating corner or edge positions b
45、y attaching reflective panels, it is possible to achieve the necessary position averaging by changing the locations and orien- tations of the additional panefs. Install the test object with an exposed continuous duct length of at least 2 m, both in the source and in the receiver room. Provide the ex
46、posed duct ends with standard end covers Soundproofing accessories to be used in installa- tions through parlition walls are often available in 3 IS0 140-10:1991(E) raceways. To test practical sealing and insulating properties of such soundproofing accessories, it is recommended that the raceway be
47、filled to its rated capacity with cables. NOTE 4 The acoustical performance can vary with the number of cables. If the edge mounting is simulated with additional panels, ensure that the panel length is at least as large as the duct length. 7 lest procedure and evaluation Ensure that the laboratory p
48、rocedures comply with the relevant clauses of IS0 140-3. 8 Precision The precision is equivalent to that given in IS0 140-3. 9 Expression of results For the statement of the airborne sound insulation of the test specimen, the values of Dne shall be given at all frequencies of measurement: in tabular
49、 form and/or in the form of a curve. For graphs with the level in decibels plotted against frequency on a logarithmic scale, the following dimensions shall be used: 5 mm for the one-third octave band; 20 mm for 10 dB. In addition, give the weighted element-normalized level difference Dn,e,w. Calculate D, as specified for single-number quantities in either IS0 717-1 or IS0 717-3. 10 Test report The test report shall state: e) r) 9) h) i) j) W 1) reference to this part of IS0 140; name and address of the testing laboratory; identification number of the test report; name and a