SIST EN ISO 717-2:1997

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.ROLUQRVWLAkustik - Bewertung der Schalldämmung in Gebäuden und von Bauteilen - Teil 2: Trittschalldämmung (ISO 717-2:1996)Acoustique - Evaluation de l'isolement acoustique des immeubles et des éléments de construction -Partie 2: Protection contre le bruit de choc (ISO 717-2:1996)Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation (ISO 717-2:1996)91.120.20L]RODFLMDAcoustics in building. Sound insulationICS:Ta slovenski standard je istoveten z:EN ISO 717-2:1996SIST EN ISO 717-2:1997en01-april-1997SIST EN ISO 717-2:1997SLOVENSKI
STANDARD



SIST EN ISO 717-2:1997



SIST EN ISO 717-2:1997



SIST EN ISO 717-2:1997



INTERNATIONAL STANDARD IS0 717-2 Second edition 1996-l 2-15 Acoustics - Rating of sound insulation in buildinas and of buildings elements - u Part 2: Impact sound insu lation Acoustique - 6valuation de / I’isolement acoustique des immeubles et des Mments de construction - Parfie 2: Protection contre le bruit de choc Reference number IS0 717-2: 1996(E) SIST EN ISO 717-2:1997



IS0 717=2:1996(E) Foreword IS0 (the International Organization for Standardization) is a worldwide fed- eration of national standards bodies (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, governmental and non- governmental, in liaison with ISO, also take part in the work. IS0 collab- orates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are cir- culated 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 IS0 717-2 was prepared by Technical Committee ISOnC 43, Acoustics, Subcommittee SC 2, Building acoustics. This second edition of IS0 717-2 cancels and replaces the first edition (IS0 717-2:1982), which has been technically revised. IS0 717 consists of the following parts, under the general title: Acoustics - Rating of sound insulation in buildings and of building elements - Part 1: Airborne sound insulation Part 2: Impact sound insulation Annexes A, B, C and D of this part of IS0 717 are for information only. 0 IS0 1996 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 permission in writing from the publisher. International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii SIST EN ISO 717-2:1997



@ IS0 IS0 717-2: 1996(E) Introduction Methods of measurement of impact sound insulation in buildings and of building elements have been standardized in IS0 140-6, IS0 140-7 and IS0 140-8. These methods give values for the impact sound insulation which are frequency dependent. The purpose of this part of IS0 717 is to standardize a method whereby the frequency-dependent values of impact sound insulation can be converted into a single number characterizing the acoustical performance. The method has been widely used since 1968. However, since there is some evidence that it could be improved, a spectrum adaptation term is added and it is recommended to gather experience with this. . . . III SIST EN ISO 717-2:1997



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~~ ~~~ INTERNATIONAL STANDARD @ IS0 IS0 717=2:1996(E) Acoustics - Rating of sound insulation in buildings and of building elements - Part 2: Impact sound insulation 1 Scope This part of IS0 717 a) b) C) defines single-number quantities for the impact sound insulation in buildings and of floors; gives rules for determining these quantities from the results of measurements carried out in one- third-octave bands in accordance with IS0 140-6 and IS0 140-7, and in octave bands in accord- ance with that option in IS0 140-7 for field meas- urements only; and defines single-number quantities for the impact sound reduction of floor coverings and floating floors from the results of measurements carried out in accordance with IS0 140-8. The single-number quantities in accordance with this part of IS0 717 are intended for rating the impact sound insulation and for simplifying the formulation of acoustical requirements in buidling codes. The re- quired numerical values of the single-number quan- tities are specified according to varying needs. The rating of results from measurements carried out over an enlarged frequency range is dealt with in an- nex A. A method for obtaining single-number quantities for bare massive floors according to their performance in combination with floor coverings is described in an- nex B. An example of the calculation of a single-number quantity is given in annex C. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of IS0 717. 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 IS0 717 are encouraged to investigate the possibility of applying the most recent editions of the standards listed below. Members of IEC and IS0 maintain registers of currently valid International Stan- dards. IS0 140-6:-l), Acoustics - Measurement of sound insulation in buildings and of building elements - Part 6: Laboratory measurements of impact sound in- sula tion of floors. IS0 1 40-7:-2), Acoustics - Measurement of sound insulation in buildings and of building elements - Part 7: Field measurements of impact sound insulation of floors. IS0 1 40-8:-3), Acoustics - Measurement of sound insulation in buildings and of building elements - Part 8: Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a stan- dard floor. 1) To be published. (Revision of IS0 140-6:1978) 2) To be published. (Revision of IS0 140-7:1978) 3) To be published. (Revision of IS0 140-8:1978) 1 SIST EN ISO 717-2:1997



IS0 717-2: 1996(E) @ IS0 3 Definitions For the purposes of this part of IS0 717, the following definitions apply. 3.1 single-number quantity for impact sound in- sulation rating derived from one-third-octave band measurements: Value, in decibels, of the relevant reference curve at 500 Hz after shifting it in accord- ance with the method specified in this part of IS0 717. 3.2 single-number quantity for impact sound in- sulation rating derived from octave band measure- ments: Value, in decibels, of the relevant reference curve at 500 Hz after shifting it in accordance with the method specified in this part of IS0 717, reduced by 5 dB. NOTES 1 Terms and symbols for the single-number quantity used depend on the type of measurement. They are listed in table 1 for impact sound insulation properties of building elements and in table 2 for impact sound insulation between rooms in buildings. 2 In order to distinguish clearly between values with and without flanking transmission, primed symbols (e.g. L’,) are used to denote values obtained with flanking transmission. 3.3 weighted reduction in impact sound pressure level: Difference between the weighted normalized impact sound pressure levels of a reference floor without and with a floor covering, obtained in accord- ance with the method specified in this part of IS0 717. This quantity is denoted by AL,,,, and is expressed in decibels. 3.4 spectrum adaptation term, Cl: Value, in deci- bels, to be added to the single-number quantity to take account of the unweighted impact sound level, thereby representing the characteristics of typical walking noise spectra. 3.5 equivalent weighted normalized impact sound pressure level of a bare massive floor: Sum of the weighted normalized impact sound pressure level of the bare floor under test with the reference floor covering and the weighted reduction in impact sound pressure level of the reference floor covering obtained in accordance with the method specified in this part of IS0 717. This quantity is denoted by Ln,eq,~,w and is expressed in decibels. Table 1 - Single-number quantities of impact sound insulation properties of floors Derived from one-third-octave band values Single-number quantity I Term and symbol Defined in I Weighted normalized impact sound Normalized impact sound pressure IS0 140-6:- pressure level, L, w equation (4) , level, L, Table 2 - Single-number quantities of impact sound insulation between rooms in buildings Derived from one-third-octave band values or octave-band values Single-number quantity I Term and symbol Defined in Weighted normalized impact sound pressure level, L’, w , Weighted standardized impact sound pressure level, CnTw I Normalized impact sound pressure level, L’, Standardized impact sound pressure level, L’,, IS0 140-7:- IS0 140-7:- equation (2) equation (3) 2 SIST EN ISO 717-2:1997



4 n . Procedure for evaluating single- rmber quantities for impact sound Insulation rating 4.1 General The values obtained in accordance with IS0 140-6 and IS0 140-7 are compared with reference values (see 4.2) at the frequencies of measurement within the range 100 Hz to 3 150 Hz for measurements in one- third-octave bands or 125 Hz to 2 000 Hz for measure- ments in octave bands. The comparison shall be carried out in accordance with 4.3. 4.2 Reference values The set of reference values used for comparison with measurement results shall be as given in table 3. The reference curves are shown in figures 1 and 2. NOTE 3 The reference values for the octave bands 125 Hz to 1 000 Hz are equivalent to the energetic sum (rounded to integers) of these for the relevant one-third- octave band values. The reference value for the octave band 2 000 Hz has been reduced to take care of the one- third-octave band 3 150 Hz, which (for bare massive floors) may contribute considerably to the unfavourable deviations. 4.3 Method of comparison 4.3.1 Measurements in one-third-octave bands To evaluate the results of a measurement of L,, L’,, or IS0 717=2:1996(E) place), shift the reference curve in steps of 1 dB towards the measured curve until the sum of un- favourable deviations is as large as possible but not more than 32,0 dB. An unfavourable deviation at a particular frequency occurs when the results of measurements exceed the reference value. Only the unfavourable deviations shall be taken into account. The value, in decibels, of the reference curve at 500 Hz, after shifting it in accordance with this pro- cedure, is L,,,,,, L’n,,,, or LlnTw respectively. , 4.3.2 Measurements in octave bands To evaluate the results of a field measurement of L’, or L’,T in octave bands (given to one decimal place), shift the reference curve in steps of 1 dB towards the measured curve until the sum of unfavourable devi- ations is as large as possible but not more than IO,0 dB. The value, in decibels, of the reference curve at 500 Hz, after shifting it in accordance with this pro- cedure and then reducing it by 5 dB is L’n,, or LhTw respectively. , An unfavourable deviation at a particular frequency occurs when the results of measurements exceed the reference value. Take into account only the unfavour- L’nT in one-third-octave bands (given to one decimal able deviations. m u > aJ F aJ ti 50 \ 42 40 30 I I I I I I I I I I I I l- 125 250 500 1000 2000 Fr 4000 equency , Hz Figure 1 - Curve of reference values for impact sound, one-third-octave bands 3 SIST EN ISO 717-2:1997



IS0 717-2: 1996(E) m D * ; 70 m iii 6? : 65 ki G 62 CY 60 30 63 125 250 500 1000 2000 4000 Frequency,Hz Figure 2 - Curve of reference values for impact sound, octave bands Table 3 - Reference values for impact sound Frequency Reference values, dB Hz One-third-octave bands Octave bands 100 62 125 62 67 160 62 200 62 250 62 67 315 62 400 61 500 60 65 630 59 800 58 1 000 57 62 1 250 54 1 600 51 2 000 48 49 2 500 45 3 150 42 4.4 Statement of results The appropriate single-number quantity shall be given with reference to this part of IS0 717. The results of measurements shall also be given in the form of a dia- gram as specified in IS0 140-6 and IS0 140-7. For field measurements in accordance with IS0 140-7, it shall be stated whether the single-number quantity is calculated from measuring results in one-third-octave bands or octave bands. In general there may be dif- ferences between single numbers calculated from one-third-octave or octave band measurements of about Ifr 1 dB. Ratings based on one-third-octave band measur
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