SIST EN ISO 140-6:1999

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Akustik - Messung der Schalldämmung in Gebäuden und von Bauteilen - Teil 6: Messung der Trittschalldämmung von Decken in Prüfständen (ISO 140-6:1998)Acoustique - Mesurage de l'isolation acoustique des immeubles et des éléments de construction - Partie 6: Mesurage en laboratoire de la transmission des bruits de choc par les planchers (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 140-6:1998)91.120.20L]RODFLMDAcoustics in building. Sound insulation91.060.01Stavbni elementi na splošnoElements of buildings in general17.140.01Acoustic measurements and noise abatement in generalICS:Ta slovenski standard je istoveten z:EN ISO 140-6:1998SIST EN ISO 140-6:1999en01-november-1999SIST EN ISO 140-6:1999SLOVENSKI
STANDARD



SIST EN ISO 140-6:1999



SIST EN ISO 140-6:1999



SIST EN ISO 140-6:1999



SIST EN ISO 140-6:1999



SIST EN ISO 140-6:1999



AReference numberISO 140-6:1998(E)INTERNATIONALSTANDARDISO140-6Second edition1998-08-15Acoustics — Measurement of soundinsulation in buildings and of buildingelements —Part 6:Laboratory measurements of impact soundinsulation of floorsAcoustique — Mesurage de l’isolation acoustique des immeubles et deséléments de construction —Partie 6: Mesurage en laboratoire de la transmission des bruits de choc parles planchersSIST EN ISO 140-6:1999



ISO 140-6:1998(E)©
ISO 1998All rights reserved. Unless otherwise specified, no part of this publication may be reproducedor utilized in any form or by any means, electronic or mechanical, including photocopying andmicrofilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 · CH-1211 Genève 20 · SwitzerlandInternetiso@iso.chPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwidefederation of national standards bodies (ISO member bodies). The work ofpreparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for whicha technical committee has been established has the right to be representedon that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISOcollaborates closely with the International Electrotechnical Commission(IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technical committees arecirculated to the member bodies for voting. Publication as an InternationalStandard requires approval by at least 75 % of the member bodies castinga vote.International Standard ISO 140-6 was prepared by Technical CommitteeISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.This second edition cancels and replaces the first edition(ISO 140-6:1978), 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 suppressedflanking transmission—Part 2: Determination, verification and application of precision data—Part 3: Laboratory measurement of airborne sound insulation ofbuilding elements—Part 4: Field measurements of airborne sound insulation betweenrooms—Part 5: Field measurements of airborne sound insulation of façadeelements and façades—Part 6: Laboratory measurements of impact sound insulation of floorsSIST EN ISO 140-6:1999



© ISOISO 140-6:1998(E)iii—Part 7: Field measurements of impact sound insulation of floors—Part 8: Laboratory measurements of the reduction of transmittedimpact noise by floor coverings on a heavyweight standard floor—Part 9: Laboratory measurement of room-to-room airborne soundinsulation of a suspended ceiling with a plenum above it—Part 10: Laboratory measurement of airborne sound insulation ofsmall building elementsAnnex A forms an integral part of this part of ISO 140. Annexes B to F arefor information only.SIST EN ISO 140-6:1999



SIST EN ISO 140-6:1999



INTERNATIONAL STANDARD
© ISOISO 140-6:1998(E)1Acoustics — Measurement of sound insulation in buildings and ofbuilding elements —Part 6:Laboratory measurements of impact sound insulation of floors1 ScopeThis part of ISO 140 specifies a laboratory method for measuring impact noise transmission through floors by usinga standard tapping machine. The method is applicable to bare floors and also to floors with coverings.The results obtained can be used to compare the impact sound insulation properties of floors and to classify floorsaccording to their sound insulation capabilities.NOTE 1
Field measurements of impact sound insulation of floors are dealt with in ISO 140-7.NOTE 2
Laboratory measurements of the reduction of transmitted impact noise by floor coverings on a heavyweight standardfloor are dealt with in ISO 140-8.2 Normative referencesThe following standards contain provisions which, through reference in this text, constitute provisions of this part ofISO 140. At the time of publication, the editions indicated were valid. All standards are subject to revision, andparties to agreements based on this part of ISO 140 are encouraged to investigate the possibility of applying themost recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently validInternational Standards.ISO 140-1:1997,
Acoustics — Measurement of sound insulation in buildings and of building elements — Part 1:Requirements for laboratory test facilities with suppressed flanking transmission.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 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: Impactsound 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.SIST EN ISO 140-6:1999



ISO 140-6:1998(E)© ISO23 DefinitionsFor the purpose of this part of ISO 140, 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 spaceand time average of the sound pressure squared to the square of the reference sound pressure, the space averagebeing taken over the entire room with the exception of those parts where the direct radiation of a sound source orthe near field of the boundaries (wall, etc.) is of significant influence; it is expressed in decibels.If a continuously moving microphone is used, L is determined byLpttpTT=ò1012002lgddBmm(). . . (1)wherepis the sound pressure, in pascals;p0is the reference sound pressure and is equal to 20 mPa;Tmis the integration time, in seconds.If fixed microphone positions are used, L is determined byLpppnpn=+++×101222202lgdBK. . . (2)where p1, p2., pn are r.m.s. sound pressures at n different positions in the room. In practice, usually the soundpressure levels Lj are measured. In this case L is determined byLnLjnj=æèççöø÷÷=å10110101lgdB. . . (3)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 receivingroom when the floor under test is excited by the standardized impact sound source; it is expressed in decibels.3.3
normalized impact sound pressure level, Ln: Impact sound pressure level Li increased by a correction termwhich is given in decibels, being ten times the logarithm to the base 10 of the ratio of the measured equivalentabsorption area A of the receiving room to the reference absorption area A0; it is expressed in decibels:LLAAnilgdB=+100. . . (4)where A0 = 10 m2.4 EquipmentThe equipment shall comply with the requirements of clause 6.The standard tapping machine shall meet the requirements given in annex A.SIST EN ISO 140-6:1999



© ISOISO 140-6:1998(E)3The accuracy of the sound level measurement equipment shall comply with the requirements of accuracy class 0 or1 defined in IEC 60651 and IEC 60804. The complete measuring system including the microphone shall be adjustedbefore each measurement to enable absolute values of sound pressure levels to be obtained. If not otherwisestated by the equipment manufacturer, a sound calibrator which complies with the requirements of accuracy class 1defined in IEC 60942 shall be used. For sound level meters calibrated for measurements in sound fields ofprogressive plane waves, corrections for the diffuse sound field shall be applied.The one-third-octave band filters shall comply with the requirements defined in IEC 61260.The reverberation 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 aregiven in OIML R58[1] and OIML R88[2]. For the standard tapping machine, similar recommendations are given in annex A.5 Test arrangement5.1 RoomsLaboratory test facilities shall comply with the requirements of ISO 140-1.5.2 Test specimenThe size of the test specimen is determined by the size of the test opening of the laboratory test facility as defined inISO 140-1. These sizes are approximately between 10 m2 and 20 m2, with the shorter edge length being not lessthan 2,3 m.Preferably install the test specimen in a manner as similar as possible to the actual construction, with a carefulsimulation of normal connections and sealing conditions at the perimeter and at joints within the specimen. Themounting conditions shall be stated in the test report.The impact sound insulation of solid floors depends on coupling to surrounding structures. In order to describeproperly the effect of the mounting, it is recommended to measure and to report the loss factor (see annex D).The sound radiated by flanking elements should be negligible compared to the sound radiated from the floor undertest. This may be checked by the procedures given in annex B.6 Test procedure and evaluation6.1 Generation of sound fieldThe impact sound shall be generated by the tapping machine (see annex A).The tapping machine shall be placed in at least four different positions randomly distributed on 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 anisotropicfloor constructions (with ribs, beams, etc.) or rough and irregular floor coverings, more positions may be necessary.The hammer connecting line should be orientated at 45° to the direction of the beams or ribs.The impact sound pressure levels may reveal a time dependency after the tapping is started. In such a case themeasurements should not begin until the noise level has become steady. The measurement period shall bereported. If stable conditions are not reached after 5 min, then the measurements should be carried out over a well-defined measurement period.When soft coverings are under test, it is necessary that the standard tapping machine fulfils special requirementsgiven in annex A. Advice regarding the mounting of the standard tapping machine on soft floor coverings is given inannex A.SIST EN ISO 140-6:1999



ISO 140-6:1998(E)© ISO46.2 Measurement of impact sound pressure level6.2.1 GeneralObtain the impact sound pressure level by using a single microphone moved from position to position, or by anarray of fixed microphones, or by a continuously moving or oscillating microphone. The sound pressure levels at thedifferent microphone positions shall be averaged on an energy basis [see equations (1) to (3)] for all positions of thetapping machine.6.2.2 Microphone positionsThe following are minimum separating distances:—0,7 m between microphone positions;—0,7 m between any microphone position and room boundaries or diffusers;—1,0 m between any microphone position and the test specimen.NOTE
Greater separating distances should be used wherever possible.a)Fixed microphone positionsA minimum of four fixed microphone positions shall be used; these shall be evenly distributed within the spacepermitted for measurement in the room.b)Moving microphone positionsWhen using a moving microphone, the sweep radius shall be at least 0,7 m. The plane of the traverse shall beinclined in order to cover a large proportion of the space permitted for measurement. The plane of traverse shall notlie within 10° of any plane of the room (wall, floor, ceiling). The duration of a traverse period shall not be less than15 s.6.2.3 Measurementa)Fixed microphone positionsThe minimum number of measurements using fixed microphone positions is six, a combination of at least fourmicrophone positions and at least 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 positionsThe minimum number of measurements using a moving microphone is four (e.g. one measurement for eachtapping machine position).When using six or eight tapping machine positions, measurements can be made using either one or two movingmicrophone positions.6.2.4 Averaging timeAt each individual microphone position, the averaging time shall be at least 6 s at each frequency band with centrefrequencies below 400 Hz. For bands of higher centre frequencies, it is permissible to decrease the time to not lessthan 4 s. Using a moving microphone, the averaging time shall cover a whole number of traverses and shall be notless than 30 s.SIST EN ISO 140-6:1999



© ISOISO 140-6:1998(E)56.3 Frequency range of measurementsThe sound pressure level shall be measured using one-third-octave band filters having at least the following centrefrequencies, in hertz:1001251602002503154005006308001 0001 2501 6002 0002 5003 1504 0005 000If additional information in the low-frequency range is required, use one-third-octave band filters with the followingcentre frequencies, in hertz:506380Guidance is given in annex C for such additional measurements in the low-frequency bands.6.4 Measurement of reverberation time and evaluation of the equivalent sound absorption areaThe correction term in equation (4) containing the equivalent sound absorption area is evaluated from thereverberation time measured according to ISO 354 and determined using Sabine's formula:AVT=016,. . . (5)whereAis the equivalent absorption area, in square metres;Vis the receiving room volume, in cubic metres;Tis the reverberation time, in seconds.Following ISO 354, the evaluation of the reverberation time from the decay curve shall begin about 0,1 s after thesound source has been switched off, or from a sound pressure level a few decibels lower than that at the beginningof the decay. The range used shall not be less than 20 dB, and shall not be so large that the observed decay cannotbe approximated by a straight line. The bottom of this range shall be at least 10 dB above the background noiselevel.The minimum number of decay measurements required for each frequency band is six. At least one loudspeakerposition and three microphone positions with two readings in each case shall be used.Moving microphones which meet the requirements of 6.2.2 may be used but the traverse time shall be not less than30 s.6.5 Correction for background noiseMeasurements of background noise levels shall be made to ensure that the observations in the receiving room arenot affected by extraneous sound such as noise from outside the test room or electrical noise in the receivingsystem. To check the latter condition, replace the microphone by a dummy microphone. Take care that the airbornenoise produced by the tapping machine and transmitted to the receiving room does not influence the impact soundpressure level in the receiving room.The background noise level shall be at least 6 dB (and preferably more than 15 dB) below the level of signal andbackground noise combined. If the difference in levels is smaller than 15 dB but greater than 6 dB, calculatecorrections to the signal level according to equation (6):()LLL=10 lg 1010 dBsbb/10-/10.
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