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1、A Reference number ISO 140-7:1998(E) INTERNATIONAL STANDARD ISO 140-7 Second edition 1998-08-15 Acoustics Measurement of sound insulation in buildings and of building elements Part 7: Field measurements of impact sound insulation of floors Acoustique Mesurage de lisolation acoustique des immeubles e
2、t des lments de construction Partie 7: Mesurage in situ de la transmission des bruits de choc par les planchers Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:46:46 MDTNo rep
3、roduction or networking permitted without license from IHS -,-,- ISO 140-7:1998(E) ISO 1998 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without
4、permission in writing from the publisher. International Organization for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internetisoiso.ch Printed in Switzerland ii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (
5、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 committee. International organizations, go
6、vernmental 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. Draft International Standards adopted by the technical committees are circulated to
7、 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 140-7 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics. This second edition cancel
8、s and replaces the first edition (ISO 140-7:1978), which has been technically revised. ISO 140 consists of the following parts, under the general title Acoustics Measurement of sound insulation in buildings and of building elements: Part 1: Requirements of laboratory test facilities with suppressed
9、flanking transmission Part 2: Determination, verification and application of precision data Part 3: Laboratory measurement of airborne sound insulation of building elements Part 4: Field measurements of airborne sound insulation between rooms Part 5: Field measurements of airborne sound insulation o
10、f faade elements and faades Part 6: Laboratory measurements of impact sound insulation of floors Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:46:46 MDTNo reproduction or ne
11、tworking permitted without license from IHS -,-,- ISOISO 140-7:1998(E) iii Part 7: Field measurements of impact sound insulation of floors Part 8: Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a heavyweight standard floor Part 9: Laboratory measurement of
12、 room-to-room airborne sound insulation of a suspended ceiling with a plenum above it Part 10: Laboratory measurement of airborne sound insulation of small building elements Annexes A and B form an integral part of this part of ISO 140. Annexes C to E are for information only. Copyright Internationa
13、l Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:46:46 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by
14、IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:46:46 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISOISO 140-7:1998(E) 1 Acoustics Measurement of sound insulation in buildings and of building
15、 elements Part 7: Field measurements of impact sound insulation of floors 1 Scope This part of ISO 140 specifies field methods for measuring the impact sound insulation properties of building floors by using a standard tapping machine. The method is applicable to bare floors and also to floors with
16、coverings. The results obtained can be used to compare the impact sound insulation properties of floors and to compare the apparent impact sound insulation of floors with specified requirements. NOTE 1 Laboratory measurements of impact sound insulation of floors are dealt with in ISO 140-6. NOTE 2 L
17、aboratory measurements of the reduction of transmitted impact noise by floor coverings on a heavyweight standard floor are dealt with in ISO 140-8. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 140.
18、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 ISO 140 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO ma
19、intain registers of currently valid International Standards. ISO 140-2:1991, 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 a
20、nd of building elements Part 3: Laboratory measurements of airborne sound insulation of building elements. ISO 354:1985, Acoustics Measurement of sound absorption in a reverberation room. ISO 717-2: 1996, Acoustics Rating of sound insulation in buildings and of building elements Part 2: Impact sound
21、 insulation. IEC 60651:1979, Sound level meters. IEC 60804:1985, Integrating-averaging sound level meters. IEC 60942: 1988, Sound calibrators. IEC 61260:1995, Electroacoustics Octave band filters and fractional Octave band filters. Copyright International Organization for Standardization Provided by
22、 IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 05:46:46 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 140-7:1998(E) ISO 2 3 Definitions For the purposes of this part of ISO 140, the definitions given in ISO 140-3
23、and the following definitions apply. 3.1 average sound pressure level in a room, L: Ten times the logarithm to the base 10 of the ratio of the space and time average of the sound pressure squared to the square of the reference sound pressure, the space average being taken over the entire room with t
24、he exception of those parts where the direct radiation of a sound source or the near field of the boundaries (wall, etc.) is of significant influence; it is expressed in decibels. In practice, usually the sound pressure levels Lj are measured. In this case L is determined by L n L j n j = 10 1 10 1
25、lgdB /10 = . . . (1) where Lj are the sound pressure levels L1 to Ln at n different positions in the room. 3.2 impact sound pressure level, Li: Average sound pressure level in a one-third-octave band in the receiving room when the floor under test is excited by the standardized impact sound source;
26、it is expressed in decibels. 3.3 normalized impact sound pressure level, Ln: Impact sound pressure level Li increased by a correction term which is given in decibels, being ten times the logarithm to the base 10 of the ratio of the measured equivalent absorption area A of the receiving room to the r
27、eference equivalent absorption area A0; it is expressed in decibels: =+LL A A ni 0 lgdB10. . . (2) with A0 = 10 m2. 3.4 standardized impact sound pressure level, LnT: Impact sound pressure level Li reduced by a correction term which is given in decibels, being ten times the logarithm to the base 10
28、of the ratio of the measured reverberation time T of the receiving room to the reference reverberation time T0; it is expressed in decibels: =-LL T T Tn i 0 10 lgdB. . . (3) NOTE 1 For dwellings T0 equals 0,5 s. NOTE 2 The standardizing of the impact sound pressure level to a reverberation time of 0
29、,5 s takes into account that in dwellings the reverberation time has been found to be (nearly independent of the volume and of the frequency) equal to 0,5 s. NOTE 3 The standardizing of the impact sound pressure level to the reverberation time of T0 = 0,5 s is equivalent to standardizing the impact
30、sound pressure level to a reference absorption area of AV 0 = 0,32 where A0is the reference absorption area, in square metres; Vis the volume of the receiving room, in cubic metres. 3.5 reduction of impact sound pressure level, DL: Difference, in decibels, between the average sound pressure levels i
31、n the receiving room before and after the installation of, for example, a floor covering. NOTE See ISO 140-8 for further information. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2
32、007 05:46:46 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO ISO 140-7:1998(E) 3 4 Equipment The equipment shall comply with the requirements of clause 5. The standard tapping machine shall meet the requirements given in annex A. The accuracy of the sound level measurem
33、ent equipment shall comply with the requirements of accuracy class 0 or 1 defined in IEC 60651 and IEC 60804. If not otherwise stated by the equipment manufacturer, the complete measuring system including the microphone shall be adjusted before each measurement using a sound calibrator which complie
34、s with the requirements of accuracy class 1 defined in IEC 60942. For sound level meters calibrated for measurements in sound fields of progressive plane waves, corrections for the diffuse sound field shall be applied. The filters shall comply with the requirements defined in IEC 61260. The reverber
35、ation time measurement equipment shall comply with the requirements defined in ISO 354. NOTE For pattern evaluation (type testing) and regular verification tests, recommended procedures for sound level meters are given in OIML R 581 and OIML R 882. 5 Test procedure and evaluation 5.1 General The fie
36、ld measurements of impact sound insulation of floors shall be made in one-third-octave bands unless octave band measurements have been agreed upon. When the results from octave band measurements are converted to single-number quantities, these results are not directly comparable with those from one-
37、third-octave band measurements. The procedure for octave band measurements is specified in annex B. 5.2 Generation of sound field The impact sound shall be generated by the tapping machine (see clause 4). The tapping machine shall be placed in at least four different positions randomly distributed o
38、n the floor under test. The distance of the tapping machine from the edges of the floor shall be at least 0,5 m. In the case of anisotropic floor constructions (with ribs, beams, etc.), more positions may be necessary. The hammer connecting line should be orientated at 45 to the direction of the bea
39、ms or ribs. The impact sound pressure levels may reveal a time dependency after the tapping is started. In such a case the measurements should not begin until the noise level has become steady. If stable conditions are not reached after 5 min, then the measurements should be carried out over a well-
40、defined measurement period. The measurement period shall be reported. When floors with soft coverings are under test, the standard tapping machine shall fulfil the special requirements given in annex A. Advice regarding the mounting of the standard tapping machine on soft floor coverings is given al
41、so in annex A. 5.3 Measurement of impact sound pressure level 5.3.1 General Obtain the impact sound pressure level by using a single microphone moved from position to position, or by an array of fixed microphones, or by a continuously moving or oscillating microphone. The sound pressure levels at th
42、e different microphone positions shall be averaged on an energy basis see equation (1) for all positions of the tapping machine. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/19/2007 0
43、5:46:46 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 140-7:1998(E) ISO 4 5.3.2 Microphone positions The following are minimum separating distances: 0,7 m between microphone positions; 0,5 m between any microphone position and room boundaries or diffusers; 1,0 m betwe
44、en any microphone position and the upper floor being excited by the tapping machine. NOTE Greater separating distances should be used wherever possible. a)Fixed microphone positions A minimum of four fixed microphone positions shall be used; these shall be evenly distributed within the space permitt
45、ed for measurement in the room. b)Moving microphone positions When using a moving microphone, the sweep radius shall be at least 0,7 m. The plane of the traverse shall be inclined in order to cover a large proportion of the space permitted for measurement. The plane of traverse shall not lie within
46、10 of any plane of the room (wall, floor, ceiling). The duration of a traverse period shall not be less than 15 s. 5.3.3 Measurement a)Fixed microphone positions The minimum number of measurements using fixed microphone positions is six, a combination of at least four microphone positions and at lea
47、st four tapping machine positions shall be used. EXAMPLE For two microphone and two tapping machine positions, make measurements for all four possible combinations. For the other two microphone and two tapping machine positions, make measurements on a one-to-one basis. b)Moving microphone positions
48、The minimum number of measurements using a moving microphone is four (e.g. one measurement for each tapping machine position). When using six or eight tapping machine positions, measurements can be made using either one or two moving microphone positions. 5.3.4 Averaging time At each individual microphone position, the averaging time shall be at least 6 s at each frequency band with centre frequencies below 400 Hz. For bands of higher centre frequencies, it is permissible to decre