1、BS EN ISO3382-1:2009ICS 91.120.20NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDAcoustics Measurement of roomacoustic parametersPart 1: Performance spaces (ISO3382-1:2009)This British Standard was published under the authority of the Standards Policy and Strate
2、gy Committee on 31 August 2009 BSI 2009ISBN 978 0 580 53585 7Amendments/corrigenda issued since publicationDate CommentsBS EN ISO 3382-1:2009National forewordThis British Standard is the UK implementation of EN ISO 3382-1:2009.Together with BS EN ISO 3382-2:2008 it partially supersedes BS EN ISO 338
3、2:2000, which will be withdrawn on publication of BS EN ISO 3382-3.The UK participation in its preparation was entrusted to TechnicalCommittee EH/1/6, Building acoustics.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport
4、 to include all the necessary provisionsof a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunityfrom legal obligations.EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 3382-1June 2009ICS 91.120.20 Supersedes EN ISO 3382:2000 Eng
5、lish VersionAcoustics - Measurement of room acoustic parameters - Part 1:Performance spaces (ISO 3382-1:2009)Acoustique - Mesurage des paramtres acoustiques dessalles - Partie 1: Salles de spectacles (ISO 3382-1:2009)Akustik - Messung von raumakustischen Parametern - Teil1: Auffhrungspltze (ISO 3382
6、-1:2009)This European Standard was approved by CEN on 14 June 2009.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical
7、references concerning such nationalstandards 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 translationunder the responsibility of a CEN membe
8、r into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latv
9、ia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: Avenue Marnix 17, B-1000 Brussels 20
10、09 CEN All rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 3382-1:2009: EBS EN ISO 3382-1:2009EN ISO 3382-1:2009 (E) 3 Foreword This document (EN ISO 3382-1:2009) has been prepared by Technical Committee ISO/TC 43 “Acoustics“ in collabor
11、ation with 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 by endorsement, at the latest by Dec
12、ember 2009, and conflicting national standards shall be withdrawn at the latest by December 2009. 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 identifying any or all such pat
13、ent rights. This document supersedes EN ISO 3382:2000. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, Fran
14、ce, 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 3382-1:2009 has been approved by CEN as a EN ISO 3382
15、-1:2009 without any modification. BS EN ISO 3382-1:2009ISO 3382-1:2009(E) ISO 2009 All rights reserved iiiContents Page Foreword iv Introduction v 1 Scope 1 2 Normative references 1 3 Terms and definitions .1 4 Measurement conditions 3 5 Measurement procedures .6 6 Evaluation of decay curves 8 7 Mea
16、surement uncertainty .9 8 Spatial averaging .10 9 Statement of results.10 Annex A (informative) Auditorium measures derived from impulse responses 12 Annex B (informative) Binaural auditorium measures derived from impulse responses .21 Annex C (informative) Stage measures derived from impulse respon
17、ses23 Bibliography 25 BS EN ISO 3382-1:2009ISO 3382-1:2009(E) iv ISO 2009 All rights reservedForeword ISO (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
18、 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, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO
19、 collaborates closely with the International Electrotechnical Commission (IEC) on all matters 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 Internation
20、al Standards. Draft International Standards adopted by the technical committees are circulated 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 elem
21、ents of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3382-1 was prepared by Technical Committee ISO/TC 43, Acoustics, Subcommittee SC 2, Building acoustics. This first edition of ISO 3382-1, together with ISO
22、3382-2 and ISO 3382-3, cancels and replaces ISO 3382:1997, of which it constitutes a technical revision. Annex A has been extended with information on JND (just noticeable difference), recommended frequency averaging and by the addition of a new parameter for LEV (listener envelopment). A new Annex
23、C has been added with parameters for the acoustic conditions on the orchestra platform. ISO 3382 consists of the following parts, under the general title Acoustics Measurement of room acoustic parameters: Part 1: Performance spaces Part 2: Reverberation time in ordinary rooms Open plan spaces are to
24、 form the subject of a future part 3. BS EN ISO 3382-1:2009ISO 3382-1:2009(E) ISO 2009 All rights reserved vIntroduction The reverberation time of a room was once regarded as the predominant indicator of its acoustical properties. While reverberation time continues to be regarded as a significant pa
25、rameter, there is reasonable agreement that other types of measurements, such as relative sound pressure levels, early/late energy ratios, lateral energy fractions, interaural cross-correlation functions and background noise levels, are needed for a more complete evaluation of the acoustical quality
26、 of rooms. This part of ISO 3382 establishes a method for obtaining reverberation times from impulse responses and from interrupted noise. The annexes introduce the concepts and details of measurement procedures for some of the newer measures, but these do not constitute a part of the formal specifi
27、cations of this part of ISO 3382. The intention is to make it possible to compare reverberation time measurements with higher certainty and to promote the use of and consensus in measurement of the newer measures. Annex A presents measures based on squared impulse responses: a further measure of rev
28、erberation (early decay time) and measures of relative sound levels, early/late energy fractions and lateral energy fractions in auditoria. Within these categories, there is still work to be done in determining which measures are the most suitable to standardize upon; however, since they are all der
29、ivable from impulse responses, it is appropriate to introduce the impulse response as the basis for standard measurements. Annex B introduces binaural measurements and the head and torso simulators (dummy heads) required to make binaural measurements in auditoria. Annex C introduces the support meas
30、ures that have been found useful for evaluating the acoustic conditions from the musicians point of view. BS EN ISO 3382-1:2009BS EN ISO 3382-1:2009INTERNATIONAL STANDARD ISO 3382-1:2009(E) ISO 2009 All rights reserved 1Acoustics Measurement of room acoustic parameters Part 1: Performance spaces 1 S
31、cope This part of ISO 3382 specifies methods for the measurement of reverberation time and other room acoustical parameters in performance spaces. It describes the measurement procedure, the apparatus needed, the coverage required, and the method of evaluating the data and presenting the test report
32、. It is intended for the application of modern digital measuring techniques and for the evaluation of room acoustical parameters derived from impulse responses. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, onl
33、y the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 61260, Electroacoustics Octave-band and fractional-octave-band filters IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications 3 Terms and defini
34、tions For the purposes of this part of ISO 3382, the following terms and definitions apply. 3.1 decay curve graphical representation of the decay of the sound pressure level in a room as a function of time after the sound source has stopped ISO 354:2003, 3.1 NOTE 1 It is possible to measure this dec
35、ay either after the actual cut-off of a continuous sound source in the room or derived from the reverse-time integrated squared impulse response of the room (see Clause 5). NOTE 2 The decay directly obtained after non-continuous excitation of a room (e.g. by recording a gunshot with a level recorder
36、) is not recommended for accurate evaluation of the reverberation time. This method ought only be used for survey purposes. The decay of the impulse response in a room is in general not a simple exponential decay, and thus the slope is different from that of the integrated impulse response. 3.2 inte
37、rrupted noise method method of obtaining decay curves by direct recording of the decay of sound pressure level after exciting a room with broadband or band limited noise ISO 354:2003, 3.3 BS EN ISO 3382-1:2009ISO 3382-1:2009(E) 2 ISO 2009 All rights reserved3.3 integrated impulse response method met
38、hod of obtaining decay curves by reverse-time integration of the squared impulse responses ISO 354:2003, 3.4 3.4 impulse response temporal evolution of the sound pressure observed at a point in a room as a result of the emission of a Dirac impulse at another point in the room ISO 354:2003, 3.5 NOTE
39、It is impossible in practice to create and radiate true Dirac delta functions, but short transient sounds (e.g. from gunshots) can offer close enough approximations for practical measurement. An alternative measurement technique, however, is to use a period of maximum-length sequence (MLS) type sign
40、al or other deterministic, flat-spectrum signal like a sine sweep and transform the measured response back to an impulse response. 3.5 reverberation time T room acoustic parameters duration required for the space-averaged sound energy density in an enclosure to decrease by 60 dB after the source emi
41、ssion has stopped NOTE 1 The reverberation time is expressed in seconds. NOTE 2 T can be evaluated based on a smaller dynamic range than 60 dB and extrapolated to a decay time of 60 dB. It is then labelled accordingly. Thus, if T is derived from the time at which the decay curve first reaches 5 dB a
42、nd 25 dB below the initial level, it is labelled T20. If decay values of 5 dB to 35 dB below the initial level are used, it is labelled T30. 3.6 States of occupancy 3.6.1 unoccupied state state of a room prepared for use and ready for speakers or for performers and audience, but without these person
43、s being present, and in the case of concert halls and opera houses, preferably with the performers chairs, music stands and percussion instruments, etc. 3.6.2 studio state rooms for speech and music state of a room occupied by performers or speakers only and without an audience (for example, during
44、rehearsals or sound recordings) and with the number of performers and other persons such as technicians corresponding to the usual number 3.6.3 occupied state state of an auditorium or theatre when 80 % to 100 % of the seats are occupied NOTE Reverberation time measured in a room will be influenced
45、by the number of people present and the above states of occupancy are defined for measurement purposes. BS EN ISO 3382-1:2009ISO 3382-1:2009(E) ISO 2009 All rights reserved 34 Measurement conditions 4.1 General The measurements of reverberation time may be made with the room in any or all states of
46、occupancy. Where the room has adjustable components for providing variable acoustical conditions, it can be relevant to carry out separate measurements with these components in each of their normal settings. The temperature and relative humidity of the air in the room should be measured to an accura
47、cy of 1 C and 5 %, respectively. An accurate description of the state of occupancy of the room is of decisive importance in assessing the results obtained by measuring the reverberation time. Extraordinary occupancies (such as that which would be created in a concert hall by a larger than usual orch
48、estra or the additional presence of a choir or standees) shall be noted with the results. In theatres, a distinction shall be made between “safety curtain up” and “safety curtain down”, between “orchestra pit open” and “orchestra pit closed”, and also between “orchestra seated on the stage”, with an
49、d without concert enclosure. In all of these cases, measurement can be useful. If the safety curtain is up, the amount of furnishing of the stage is of importance and shall be described. Where variable components involve active (i.e. electronic) techniques, the effects of these should be measured, too, but as certain types of electronic reverberation enhancement systems create non-time-stationary conditions in the room, a unique impulse response will not exist and caution should be exercised in using synchrono
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