BS-ISO-13347-2-2004 BS-848-2.2-2004.pdf
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1、BRITISH STANDARD BS ISO 13347-2:2004 BS 848-2.2:2004 Incorporating corrigendum no. 1 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 2: Reverberant room method ICS 17.140.20; 23.120 ? BS ISO 13347-2:2004 This British Standard was published under
2、the authority of the Standards Policy and Strategy Committee on 25 August 2004 BSI 2006 ISBN 0 580 44360 4 National foreword This British Standard was published by BSI. It is the UK implementation of ISO 13347-2:2004, incorporating corrigendum October 2006. Together with BS ISO 13347-1:2004 (BS 848-
3、2.1:2004), BS ISO 13347-3:2004 (BS 848-2.3:2004), BS ISO 13447-4:2004 (BS 848-2.4:2004), it supersedes BS 848-2:1985, which is now withdrawn. The start and finish of text introduced or altered by ISO corrigendum October 2006 is indicated in the text by CC. The UK participation in its preparation was
4、 entrusted to Technical Committee MCE/17, Industrial fans. 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 correct application. Co
5、mpliance with a British Standard cannot of itself confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments 16790 Corrigendum No. 1 29 December 2006See national foreword Reference number ISO 13347-2:2004(E) INTERNATIONAL STANDARD ISO 13347-2 First edition 2004
6、-08-15 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 2: Reverberant room method Ventilateurs industriels Dtermination des niveaux de puissance acoustique des ventilateurs dans des conditions de laboratoire normalises Partie 2: Mthode de la sall
7、e rverbrante BS ISO 133472:2004 ii IS-74331 O2:(4002E) iii Contents Page Forewordiv Introduction v 1 Scope1 2 Normative references .1 3 Limitations on use 2 4 Field of application .2 5 Instrumentation.3 6 Test method.3 7 Acoustic environment 3 8 Test set-up and ducting3 9 Observations .10 10 Calcula
8、tions.10 Annex A (normative) Room qualification for sound sources with broad band sound .12 Annex B (informative) Room qualification for sound sources with pure tones/narrow-band sound14 Annex C (informative) Total fan sound testing with attached ducts.18 Annex D (normative) Transmission element.20
9、Bibliography .22 BS ISO 133472:2004 IS-74331 O2:(4002E) iv Foreword 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 out through ISO technical committ
10、ees. 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 collaborates closely with the Int
11、ernational 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 International Standards. Draft International
12、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 elements of this document may be the s
13、ubject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 13347-2 was prepared by Technical Committee ISO/TC 117, Industrial fans. ISO 13347 consists of the following parts, under the general title Industrial fans Determination of fan sound power l
14、evels under standardized laboratory conditions: Part 1: General overview Part 2: Reverberant room method Part 3: Enveloping surface methods Part 4: Sound intensity method BS ISO 133472:2004 IS-74331 O2:(4002E) v Introduction The need for this new International Standard, ISO 13347, has been evident f
15、or some time. Whilst a number of national standards exist for the measurement of fan noise, none has received universal acceptance nor may comparisons be readily made. Forming part of the ISO/TC 117 series of fan standards, this part of ISO 13347 deals with the determination of the fan sound power l
16、evel appropriate to a particular application. In describing the test and rating procedures, numerous references are made to ISO 5801 as well as to other relevant ISO standards. This reverberant room method should be read in conjunction with ISO 13447-1 and each parts of ISO 13347 which details other
17、 methods for determining the sound power radiated by a fan in specified installation conditions as a function of frequency. This part of ISO 13347 primarily deals with the determination of sound power levels of industrial fans used for ducted applications. The test procedures described in this part
18、of ISO 13347 relate to laboratory conditions. The measurement of performance under site conditions is not included. Acoustic system effects can be considerable where the airflow into and out of the fan is not free from swirl, nor the velocity profile there fully developed. This part of ISO 13347 des
19、cribes methods for determining sound power levels of fans in one-third octave bandwidths. Data obtained in accordance with this part of ISO 13347 may be used for the following purposes amongst others: a) comparison of fans which are similar in size and type; b) comparison of fans which are different
20、 in size and type; c) determining whether a fan complies with a specified upper limit of sound emission; d) scaling of fan noise from one size and speed to another size and speed; e) prediction of sound pressure level in an installation of which the fan forms a part; f) engineering work to assist in
21、 developing quiet machinery and equipment. BS ISO 133472:2004 blank 1 Industrial fans Determination of fan sound power levels under standardized laboratory conditions Part 2: Reverberant room method 1 Scope This part of ISO 13347 gives a detailed description of reverberant room methods for the deter
22、mination of fan sound power levels. It is for use under standardized laboratory conditions and recognises that tests in situ are subject to increased uncertainty. These test procedures are not necessarily appropriate to site test conditions. Acoustic system effects are presently the subject of consi
23、derable research effort. ISO 5136, which covers the in-duct method, and ISO 10302 for small fans, should be used in conjunction with this part of ISO 13347. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only th
24、e edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 3740:2000, Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards ISO 3741, Acoustics Determination of sound power
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