1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN ISO 3382-3:2012Acoustics Measurement ofroom acoustic parametersPart 3: Open plan offices (ISO 3382-3:2012)BS EN ISO 3382-3:2012 BRITISH STANDARDNational forewordThis Britis
2、h Standard is the UK implementation of EN ISO 3382-3:2012. Together with BS EN ISO 3382-1:2009 and BS EN ISO 3382-2:2008 it supersedes BS EN ISO 3382:2000, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee EH/1/6, Building acoustics.A list of organizatio
3、ns 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 correct application. The British Standards Institution 2012. Published by BSI Standards Limited 2012ISBN
4、 978 0 580 67746 5 ICS 91.120.20 Compliance with a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 February 2012.Amendments issued since publicationDate T e x t a f f e c t e d
5、EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3382-3 February 2012 ICS 91.120.20 English Version Acoustics - Measurement of room acoustic parameters - Part 3: Open plan offices (ISO 3382-3:2012) Acoustique - Mesurage des paramtres acoustiques des salles - Partie 3: Bureaux ouverts (ISO 33
6、82-3:2012) Akustik - Messung von Parametern der Raumakustik - Teil 3: Durchgehende Rume (ISO 3382-3:2012) This European Standard was approved by CEN on 14 January 2012. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European S
7、tandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (Eng
8、lish, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
9、 Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN
10、COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3382-3:2012: EBS EN ISO 3382-
11、3:2012EN ISO 3382-3:2012 (E) 3 Foreword This document (EN ISO 3382-3:2012) has been prepared by Technical Committee ISO/TC 43 “Acoustics“ in collaboration with the Technical Committee CEN/TC 126 “Acoustic properties of building elements and of buildings” the secretariat of which is held by AFNOR. Th
12、is European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2012, and conflicting national standards shall be withdrawn at the latest by August 2012. Attention is drawn to the possibility that some of th
13、e elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying 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 t
14、his European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerla
15、nd, Turkey and the United Kingdom. Endorsement notice The text of ISO 3382-3:2012 has been approved by CEN as a EN ISO 3382-3:2012 without any modification. BS EN ISO 3382-3:2012ISO 3382-3:2012(E) ISO 2012 All rights reserved iiiContents PageForeword ivIntroduction v1 Scope 12 Normative references .
16、 13 Terms and definitions . 14 Single number quantities 25 Measurement conditions . 35.1 Equipment . 35.2 Measurement procedure . 36 Determination of single number quantities . 66.1 Sound power spectrum of normal speech . 66.2 Spatial decay rate of A-weighted sound pressure level of speech 66.3 Dist
17、raction and privacy distances 96.4 Background noise . 97 Test report . 9Annex A (informative) Examples of target values for evaluation of measurement data . 11Annex B (informative) Relation between speech transmission index and work performance12Bibliography .14BS EN ISO 3382-3:2012ISO 3382-3:2012(E
18、)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (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 t
19、echnical 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. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters
20、 of electrotechnical standardization.International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated
21、to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for
22、 identifying any or all such patent rights.ISO 3382-3 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics.ISO 3382 consists of the following parts, under the general title Acoustics Measurement of room acoustic parameters: Part 1: Performance spaces Part 2
23、: Reverberation time in ordinary rooms Part 3: Open plan officesiv ISO 2012 All rights reservedBS EN ISO 3382-3:2012ISO 3382-3:2012(E)IntroductionThe phrase “open plan offices” in the context of this part of ISO 3382 covers offices and similar spaces where a large number of people can work, have a c
24、onversation, or concentrate independently in well-defined work stations. In open plan offices, the occupants are affected by activities surrounding them. Insufficient acoustic conditions lead to distraction and a lack of speech privacy. Distraction weakens the ability to concentrate and reduces prod
25、uctivity, especially in tasks requiring cognitive resources. Low speech privacy prevents confidential or partly confidential conversations. Speech can be intrusive for the listener, whereas for the speaker, it can be desirable to avoid involuntary spread of speech of a private nature.The design of o
26、pen plan spaces includes careful consideration of the layout of the workstations and mutual arrangement of teams or workgroups. Other factors affecting the acoustical performance of open plan spaces are sound absorption, height of screens and storage units, background noise, degree of workstation en
27、closure, distance between workstations, and room dimensions. The reverberation time of a room used to be regarded as the predominant indicator of its acoustical properties. However, there is evidence that other types of measurements such as rate of spatial decay of sound pressure levels, speech tran
28、smission index and background noise levels are needed for a more complete evaluation. If reverberation time is considered relevant, it should be measured in accordance with ISO 3382-2.This part of ISO 3382 specifies a measurement method which results in single number quantities indicating the genera
29、l acoustical performance of open plan offices. The principal aim is good speech privacy between workstations. The measurement method and resulting single number quantities correspond well with perceived acoustic conditions of the worker.Furniture strongly affects acoustic conditions. Therefore, the
30、measurements are performed only when the room is completely finished, including furniture. Measurement in an unfurnished room does not describe the perceived acoustical conditions. It is also important that the measurements are carried out when people are absent, but with the normal daytime backgrou
31、nd noise, whether it is caused by ventilation, traffic noise or an artificial masking sound system. If people are present, the background noise level varies strongly with time and the determination of reliable results becomes impossible.The single number quantities are designed to represent the situ
32、ation where a single person is talking and the rest are silent. Therefore, the measurements are made by using a single loudspeaker. If many people speak simultaneously, the masking is increased and the degree of distraction gets weaker (see Reference 10). Therefore, the results describe the most dis
33、tracting situation. However, this part of ISO 3382 can be used to determine the room acoustic quality of, for example, call centres where many speakers are active continuously. In such cases, the sound environment caused by many simultaneous speakers may cause a positive speech masking effect and th
34、e results of this part of ISO 3382 may underestimate the perceived speech privacy. ISO 2012 All rights reserved vBS EN ISO 3382-3:2012BS EN ISO 3382-3:2012Acoustics Measurement of room acoustic parameters Part 3: Open plan offices1 ScopeThis part of ISO 3382 specifies methods for the measurement of
35、room acoustic properties in open plan offices with furnishing. It specifies measurement procedures, the apparatus needed, the coverage required, the method for evaluating the data, and the presentation of the test report.The measurement results can be used to evaluate room acoustic properties in ope
36、n plan offices. This part of ISO 3382 is intended for medium and large size open plan offices.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edit
37、ion of the referenced document (including any amendments) applies.ISO 3382-1, Acoustics Measurement of room acoustic parameters Part 1: Performance spacesISO 3740, Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standardsISO 3744, Acoustics Determinatio
38、n of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting planeISO 14257, Acoustics Measurement and parametric description of spatial sound distribution curves in workrooms for evaluation of their acousti
39、cal performanceISO 16032, Acoustics Measurement of sound pressure level from service equipment in buildings Engineering methodIEC 61672-1, Electroacoustics Sound level meters Part 1: SpecificationsIEC 61260, Electroacoustics Octave-band and fractional-octave-band filtersIEC 60268-16:2011, Sound syst
40、em equipment Part 16: Objective rating of speech intelligibility by speech transmission index3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.3.1spatial sound distribution of the A-weighted sound pressure level of speechcurve which shows how the A-w
41、eighted sound pressure level decreases as a function of the distance from the sound source emitting noise with the sound power spectrum of normal speechINTERNATIONAL STANDARD ISO 3382-3:2012(E) ISO 2012 All rights reserved 1BS EN ISO 3382-3:2012ISO 3382-3:2012(E)3.2spatial decay rate of speechD2,Sra
42、te of spatial decay of A-weighted sound pressure level of speech per distance doublingNOTE This definition is an application of DL2defined in ISO 14257, but using the spectrum of normal speech and A-weighting over the whole frequency range. The spatial decay is not determined for individual octave b
43、ands.3.3A-weighted sound pressure level of speech at a distance of 4 mLp,A,S,4 mnominal A-weighted sound pressure level of normal speech at a distance of 4,0 m from the sound sourceNOTE The measurement position does not need to be located at this distance from the sound source. Lp,A,S,4 mis obtained
44、 using a linear regression line from the spatial sound distribution of the A-weighted sound pressure level (SPL) of speech.3.4speech transmission indexSTIphysical quantity representing the transmission quality of speech with respect to intelligibilityIEC 60268-16:20113.5spatial sound distribution of
45、 the speech transmission indexcurve which shows how the speech transmission index decreases from a reference sound source when distance increases3.6distraction distancerDdistance from speaker where the speech transmission index falls below 0,50NOTE 1 Distraction distance is expressed in metres.NOTE
46、2 Above the distraction distance, concentration and privacy start to improve rapidly (see References 814).3.7privacy distancerPdistance from speaker where the speech transmission index falls below 0,20NOTE 1 Privacy distance is expressed in metres.NOTE 2 Above the privacy distance, concentration and
47、 privacy are experienced very much the same as between separate office rooms (see References 814). STI values less than 0,20 are difficult to achieve in offices with poor speech privacy or small volume.3.8background noise levelLp,Bsound pressure level in octave bands present at the workstation durin
48、g working hours with people absentNOTE Background noise here means all such continuous sounds, which are not caused by people, e.g. heating, ventilation and air conditioning (HVAC) devices, environmental traffic noise, office equipment or a sound-masking system.4 Single number quantitiesThe sound pr
49、essure levels and STI shall be measured in octave bands from 125 Hz to 8 000 Hz. STI shall be determined in accordance with the full method specified in IEC 60268-16.2 ISO 2012 All rights reservedBS EN ISO 3382-3:2012ISO 3382-3:2012(E)The measurement data shall be converted into four simple single number quantities to facilitate the use in acoustic design and to enable the future establishment of simple target values. The single number quantities that are determined are: distraction distance, rD; spatial
