1、October 2009DEUTSCHE NORM English price group 14No part of this standard may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 91.120.20!$Z)=“1550626
2、www.din.deDDIN EN ISO 3382-1Acoustics Measurement of room acoustic parameters Part 1: Performance spaces (ISO 3382-1:2009)English version of DIN EN ISO 3382-1:2009-10Akustik Messung von Parametern der Raumakustik Teil 1: Auffhrungsrume (ISO 3382-1:2009)Englische Fassung DIN EN ISO 3382-1:2009-103382
3、-2:2008-09,supersedesDIN EN ISO 3382:2000-03www.beuth.deTogether with DIN EN ISODocument comprises 32 pagesDIN EN ISO 3382-1:2009-10 2 National foreword This standard has been prepared by Technical Committee ISO/TC 43/SC 2 “Building acoustics” (Secretariat: DIN, Germany), in collaboration with Techn
4、ical Committee CEN/TC 126 “Acoustic properties of building elements and of buildings” (Secretariat: AFNOR, France). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Technical Committee NA 062-02-31 AA Schalldmmung
5、 und Schallabsorption, Messung und Bewertung. The DIN Standards corresponding to the International Standards referred to in this document are as follows: IEC 61260 DIN EN 61260 IEC 61672-1 DIN EN 61672-1 Amendments This standard differs from DIN EN ISO 3382:2000-03 as follows: a) The standard has be
6、en divided into two parts. b) Subclause 4.3 “Measurement positions” has been modified. c) Subclause 5.3.3 “Integration of the impulse response” has been modified. d) Clause 6 “Evaluation of decay curves” has been modified. e) Clause 7 “Measurement uncertainty” has been added. f) Annex C “Stage measu
7、res derived from impulse responses” has been added. Previous editions DIN 52216: 1965-08 DIN EN ISO 3382: 2000-03 National Annex NA (informative) Bibliography DIN EN 61260, Electroacoustics Octave-band and fractional-octave-band filters DIN EN 61672-1, Electroacoustics Sound level meters Part 1: Spe
8、cifications EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 3382-1 June 2009 ICS 91.120.20 Supersedes EN ISO 3382:2000English Version Acoustics - Measurement of room acoustic parameters - Part 1: Performance spaces (ISO 3382-1:2009) Acoustique - Mesurage des paramtres acoustiques des salles
9、 - Partie 1: Salles de spectacles (ISO 3382-1:2009) Akustik Messung von Parametern der Raumakustik Teil 1: Auffhrungsrume (ISO 3382-1:2009) 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 condit
10、ions for giving this European Standard 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 Management Centre or to any CEN member. This European Standard exists in three
11、 official versions (English, 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Au
12、stria, Belgium, Bulgaria, 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 and United Kingdom. EUROPEAN CO
13、MMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2009 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 3382-1:2009: EContents 2 DIN EN
14、 ISO 3382-1:2009-10 EN ISO 3382-1:2009 (E) Page Foreword .3 Introduction.4 1 Scope5 2 Normative references5 3 Terms and definitions .5 4 Measurement conditions 7 5 Measurement procedures.10 6 Evaluation of decay curves 12 7 Measurement uncertainty.13 8 Spatial averaging.14 9 Statement of results 14
15、Annex A (informative) Auditorium measures derived from impulse responses16 Annex B (informative) Binaural auditorium measures derived from impulse responses .25 Annex C (informative) Stage measures derived from impulse responses .27 Bibliography29 Foreword 3 collaboration with Technical Committee CE
16、N/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 December 2009, and conflicting natio
17、nal 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 patent rights. This document superse
18、des 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, France, Germany, Greece, Hungary, Ice
19、land, 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 3382-1:2009 without any modification.
20、 DIN EN ISO 3382-1:2009-10 EN ISO 3382-1:2009 (E) This document (EN ISO 3382-1:2009) has been prepared by Technical Committee ISO/TC 43 “Acoustics” in Introduction The reverberation time of a room was once regarded as the predominant indicator of its acoustical properties. While reverberation time c
21、ontinues to be regarded as a significant parameter, 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 co
22、mplete evaluation of the acoustical quality 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
23、not constitute a part of the formal specifications 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
24、impulse responses: a further measure of reverberation (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 standa
25、rdize upon; however, since they are all derivable 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 aud
26、itoria. Annex C introduces the support measures that have been found useful for evaluating the acoustic conditions from the musicians point of view. 4 DIN EN ISO 3382-1:2009-10 EN ISO 3382-1:2009 (E) 1 Scope This part of ISO 3382 specifies methods for the measurement of reverberation time and other
27、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. It is intended for the application of modern digital measuring techniques and for the evaluatio
28、n 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, only the edition cited applies. For undated references, the latest edition of the referenced documen
29、t (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 definitions For the purposes of this part of ISO 3382, the following terms and definitions apply. 3.1 d
30、ecay 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 decay either after the actual cut-off of a continuous sound source in the room or derived from the r
31、everse-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) is not recommended for accurate evaluation of the reverberation time. This method ought only be
32、 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 interrupted noise method method of obtaining decay curves by direct recording of the decay of sound p
33、ressure level after exciting a room with broadband or band limited noise ISO 354:2003, 3.3 5 DIN EN ISO 3382-1:2009-10 EN ISO 3382-1:2009 (E) 3.3 integrated impulse response method method of obtaining decay curves by reverse-time integration of the squared impulse responses ISO 354:2003, 3.4 3.4 imp
34、ulse 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 It is impossible in practice to create and radiate true Dirac delta functions, but short transient sounds (e.g. from
35、 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 signal or other deterministic, flat-spectrum signal like a sine sweep and transform the measured response back to an imp
36、ulse 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 emission has stopped NOTE 1 The reverberation time is expressed in seconds. NOTE 2 T can be evaluated based on a smalle
37、r 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 and 25 dB below the initial level, it is labelled T20. If decay values of 5 dB to 35 dB below the initial level are u
38、sed, 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 persons being present, and in the case of concert halls and opera houses, preferably with the performers chairs, music sta
39、nds 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 rehearsals or sound recordings) and with the number of performers and other persons such as technicians correspondin
40、g 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 by the number of people present and the above states of occupancy are defined for measurement purposes. 6 DIN EN ISO
41、 3382-1:2009-10 EN ISO 3382-1:2009 (E) 4 Measurement conditions 4.1 General The measurements of reverberation time may be made with the room in any or all states of occupancy. Where the room has adjustable components for providing variable acoustical conditions, it can be relevant to carry out separ
42、ate 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 accuracy of 1 C and 5 %, respectively. An accurate description of the state of occupancy of the room is of decisive importance in assessing t
43、he 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 orchestra or the additional presence of a choir or standees) shall be noted with the results. In theatres, a distinction shall be made betw
44、een “safety curtain up” and “safety curtain down”, between “orchestra pit open” and “orchestra pit closed”, and also between “orchestra seated on the stage”, with and without concert enclosure. In all of these cases, measurement can be useful. If the safety curtain is up, the amount of furnishing of
45、 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 im
46、pulse response will not exist and caution should be exercised in using synchronous averaging during the course of making measurements. 4.2 Equipment 4.2.1 Sound source The sound source shall be as close to omnidirectional as possible (see Table 1). It shall produce a sound pressure level sufficient
47、to provide decay curves with the required minimum dynamic range, without contamination by background noise. In the case of measurements of impulse responses using pseudo-random sequences, the required sound pressure level might be quite low because a strong improvement of the signal-to-noise ratio b
48、y means of synchronous averaging is possible. In the case of measurements which do not use a synchronous averaging (or other) technique to augment the decay range, a source level will be required that gives at least 45 dB above the background level in the corresponding frequency band. If only T20is
49、to be measured, it is sufficient to create a level at least 35 dB above the background level. Table 1 lists the maximum acceptable deviations from omnidirectionality when averaged over “gliding” 30 arcs in a free sound field. In case a turntable cannot be used, measurements per 5 should be performed, followed by “gliding” averages, each covering six neighbouring points. The reference value shall be determined from a 360 energetic average in the measurement plane. The minimum distance between source and microphone shall be 1,5 m duri
