1、BRITISH STANDARDBS EN ISO 15186-3:2010Acoustics Measurement of sound insulation in buildings and of building elements using sound intensity Part 3: Laboratory measurements at low frequenciesICS 91.120.20g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3
2、g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58National forewordThis British Standard is the UK implementation of EN ISO 15186-3:2010. It is identical to ISO 15186-3:2002. Itsupersedes BS ISO 15186-3:2002 which is withdrawn.The UK participation
3、 in its preparation was entrusted to Technical Committee EH/1/6, Building acoustics.A list of organizations represented on this committee can be obtained on request to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its
4、 correct application.Compliance with a British Standard cannot confer immunity from legal obligations.BS EN ISO 15186-3:2010This British Standard, having been prepared under the direction of the Health and Environment Sector Policy and Strategy Committee, was published under the authority of the Sta
5、ndards Policy and Strategy Committee on22 November 2002 BSI 2010Amendments/corrigenda issued since publicationAmd. No. Date Comments 30 November 2010This corrigendum renumbers BS ISO 15186-3:2002 as BS EN ISO 15186-3:2010ISBN 978 0 580 71779 6EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO
6、15186-3 September 2010 ICS 91.120.20 English Version Acoustics - Measurement of sound insulation in buildings and of building elements using sound intensity - Part 3: Laboratory measurements at low frequencies (ISO 15186-3:2002) Acoustique - Mesurage par intensit de lisolation acoustique des immeubl
7、es et des lments de construction - Partie 3: Mesurages en laboratoire de basses frquences (ISO 15186-3:2002) Akustik - Bestimmung der Schalldmmung in Gebuden und von Bauteilen aus Schallintensittsmessungen - Teil 3: Messungen bei niedrigen Frequenzen im Prfstand (ISO 15186-3:2002) This European Stan
8、dard was approved by CEN on 5 August 2010. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning s
9、uch national standards may be obtained on application to the CEN Management Centre or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own langu
10、age and notified to the CEN Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lith
11、uania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010
12、CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 15186-3:2010: EForeword The text of ISO 15186-3:2002 has been prepared by Technical Committee ISO/TC 43 “Acoustics” of the International Organization for Standardization (ISO) and
13、 has been taken over as EN ISO 15186-3:2010 by Technical Committee CEN/TC 126 “Acoustic properties of building elements and of buildings” the secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or
14、by endorsement, at the latest by March 2011, and conflicting national standards shall be withdrawn at the latest by March 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for i
15、dentifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
16、Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 15186-3:2002 has been approved by CEN as a EN ISO 15186-3
17、:2010 without any modification. BS EN ISO 15186-3:2010EN ISO 15186-3:2010 (E)iiiContents Page1 Scope . 11.1 General 11.2 Precision 12 Normative references . 13 Terms and definitions 24 Instrumentation . 44.1 General 44.2 Calibration . 55 Test arrangement 55.1 Rooms . 55.2 Test specimen 55.3 Mounting
18、 conditions . 66 Test procedure 66.1 General 66.2 Generation of sound field 66.3 Measurement of the average sound pressure level over the surface of the test specimenin the source room . 66.4 Measurement of the average sound intensity level on the receiving side 76.5 Background noise 96.6 Frequency
19、range of measurements . 107 Expression of results 108 Test report 10AnnexesA Qualification 11B Estimated precision of the method 13Bibliography. 14BS EN ISO 15186-3:2010EN ISO 15186-3:2010 (E)This page deliberately set blank ISO 2002 r llAithgs reservde 1Acoustics Measurement of sound insulation in
20、buildings and of building elements using sound intensity Part 3:Laboratory measurements at low frequencies1 Scope1.1 GeneralThis part of ISO 15186 specifies a sound intensity method to determine the sound reduction index and the element-normalized level difference of building elements at low frequen
21、cies. This method has significantly betterreproducibility in a typical test facility than those of ISO 140-3, ISO 140-10 and ISO 15186-1. The results are moreindependent of the room dimensions of the laboratory and closer to values that would be measured between roomsof volume greater than . This pa
22、rt of ISO 15186 is applicable in the frequency range to but ismainly intended for the frequency range to .NOTE For elements faced with thick, porous absorbers, the recommended frequency range is to .The main differences between the methods of ISO 15186-1 and ISO 15186-3 are that in ISO 15186-3a) the
23、 sound pressure level of the source room is measured close to the surface of the test specimen, andb) the surface opposite the test specimen in the receiving room is highly absorbing and converts the roomacoustically into a duct with several propagating cross-modes above the lowest cut-on frequency.
24、The results found by the method of ISO 15186-3 can be combined with those of ISO 140-3 and ISO 15186-1 toproduce data in the frequency range to 1.2 PrecisionThe reproducibility of this intensity method is, for all frequencies, estimated to be equal to or better than that foundwith the method of ISO
25、140-3 at .Some comparisons of data obtained with the methods of this part of ISO 15186 and ISO 140-3 are given in annex B.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis part of ISO 15186. For dated refere
26、nces, subsequent amendments to, or revisions of, any of these publicationsdo not apply. However, parties to agreements based on this part of ISO 15186 are encouraged to investigate thepossibility of applying the most recent editions of the normative documents indicated below. For undated references,
27、the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers ofcurrently valid International Standards.ISO 140-1, Acoustics Measurement of sound insulation in buildings and of building elements Part 1:Requirements for laboratory test facilities with sup
28、pressed flanking transmissionISO 140-3:1995, Acoustics Measurement of sound insulation in buildings and of building elements Part 3:Laboratory measurements of airborne sound insulation of building elements300 m350 Hz 160 Hz50 Hz 80 Hz50 Hz 80 Hz50 Hz 5 000 Hz.100 Hz1BS EN ISO 15186-3:2010EN ISO 1518
29、6-3:2010 (E)2 ISO 2002 Ar llithgr seresvdeISO 140-10, Acoustics Measurement of sound insulation in buildings and of building elements Part 10:Laboratory measurement of airborne sound insulation of small building elementsISO 9614-1:1993, Acoustics Determination of sound power levels of noise sources
30、using sound intensity Part 1: Measurement at discrete pointsIEC 60942, Electroacoustics Sound calibratorsIEC 61043:1993, Electroacoustics Instruments for the measurement of sound intensity Measurement with pairsof pressure sensing microphones3 Terms and definitionsFor the purposes of this part of IS
31、O 15186, the following terms and definitions apply.3.1 average sound pressure level on a test surfaceten times the common logarithm of the ratio of the surface and the time average of the sound pressure squared to thesquare of the reference sound pressureNOTE The surface average is taken over the en
32、tire test surface in the source room, including reflecting effects from the testspecimen.3.2 sound reduction indexten times the common logarithm of the ratio of the sound power, , incident on the test specimen to the soundpower, transmitted through the specimen(1)NOTE The expression “sound transmiss
33、ion loss” is also in use.3.3 sound intensitytime-averaged rate of flow of sound energy per unit area oriented normal to the local particle velocityNOTE This is a vectorial quantity which is equal to(2)whereis the instantaneous sound pressure at a point, in pascals;is the instantaneous particle veloc
34、ity at the same point, in metres per second;is the averaging time, in seconds.LpSRW1W2R= 10 lgparenleftbiggW1W2parenrightbiggdBII =1TTintegraldisplay0p(t) u (t) dtWm2p(t)u (t)T2BS EN ISO 15186-3:2010EN ISO 15186-3:2010 (E) ISO 2002 r llAithgs reservde 33.4 normal sound intensitycomponent of the soun
35、d intensity in the direction normal to a measurement surface defined by the unit normal vector(3)where is the unit normal vector directed out of the volume enclosed by the measurement surface3.5 normal sound intensity levelten times the common logarithm of the ratio of the unsigned value of the norm
36、al sound intensity to the referenceintensity (4)where 3.6 surface-pressure intensity indicatordifference between the sound pressure level, , and the normal sound intensity level, , on the measurementsurface, both being time and surface averaged(5)NOTE This notation is according to ISO 9614-2. In ISO
37、 9614-1 the notation is used.3.7 residual-pressure intensity indexdifference between the indicated sound pressure level, , and the indicated sound intensity level, , when theintensity probe is placed and oriented in a sound field such that the sound intensity is zeroNOTE 1 It is expressed in decibel
38、s.NOTE 2 Details for determining are given in IEC 61043:(6)3.8 intensity sound reduction indexfor one source room and one receiving room with an absorbing back wall, index defined by(7)whereis the average sound pressure level over the surface of the test specimen in the source room, in decibels;is t
39、he average normal sound intensity level over the measurement surface in the receiving room, indecibels;InnIn=I nnLInI0LIn= 10 lgparenleftbiggInI0parenrightbiggdBI0= 1012W/m2FpILpLInFpI= (LpLIn)dBF2pI0LpLIpI0pI0= (LpLI)dBRIRI=LpS 9 bracketleftbiggLIn+ 10 lgparenleftbiggSmSparenrightbiggbracketrightbi
40、ggdBLpSLIn3BS EN ISO 15186-3:2010EN ISO 15186-3:2010 (E)4 ISO 2002 Ar llithgr seresvdeis the total area of the measurement surface(s), in square metres;is the area of the test specimen under test, in square metres.NOTE Equation (7) is valid for a test specimen with a reflecting surface in the source
41、 room. It will also work satisfactorily formoderately absorbing surfaces (e.g. surfaces covered with thick porous absorbers). For to thickabsorbers, it is recommended to restrict the frequency range to to . For even thicker absorbers, the equation is nolonger valid.3.9 intensity element normalized l
42、evel differencedifference given by(8)whereis the average sound pressure level over the surface of the test specimen in the source room, in decibels;is the average normal sound intensity level over the measurement surface in the receiving room, indecibels;is the total area of the measurement surface(
43、s), in square metres;is the number of small building element units installed within the measurement surface.NOTE Equation (8) is valid for a test specimen with a reflecting surface in the source room. It will also work satisfactorily formoderately absorbing surfaces (e.g. surfaces covered with thick
44、 porous absorbers). For to thickabsorbers, it is recommended to restrict the frequency range to to . For even thicker absorbers, the equation is nolonger valid.3.10 measurement surfacesurface totally enclosing the test specimen on the receiving side, scanned or sampled by the probe during themeasure
45、ments3.11 measurement distancedistance between the measurement surface and the specimen in a direction normal to the specimen3.12 measurement sub-areapart of the measurement surface being measured with the intensity probe, using one continuous scan or discretepositions4 Instrumentation4.1 GeneralThe
46、 intensity measuring instrumentation shall be capable of measuring intensity levels with reference to in decibels in one-third-octave bands. The intensity shall be measured in real time when the scanning procedure isused. The instrument, including the probe, shall comply with IEC 61043:1993, class 1
47、.SmS100 mm 100 mm 200 mm50 Hz 80 HzDIn,eDIn,e=LpS 9 bracketleftbiggLIn 10 lgparenleftbiggA0Smparenrightbigg 10 lg NbracketrightbiggLpSLInA0= 10 m2SmN100 mm 100 mm 200 mm50 Hz 80 Hzd1012W/m24BS EN ISO 15186-3:2010EN ISO 15186-3:2010 (E) ISO 2002 r llAithgs reservde 5The residual-pressure intensity in
48、dex of the microphone probe and analyser shall be higher than .For most intensity probes, a spacer is recommended.The equipment for sound pressure level measurements shall meet the requirements of ISO 140-3.4.2 CalibrationVerify compliance with IEC 61043 either at least once a year in a laboratory m
49、aking calibrations in accordance withappropriate standards, or at least every 2 years if an intensity calibrator is used before each measurement series.The following procedure shall be followed before each use of a sound intensity instrument to check that an instrumentwhich has undergone type test and verification is still operating correctly.a) Allow the instrument to warm up according to the manufacturers instructions.b) Set the instrument to the sound pressure mode and apply a
