1、 ANSI/ASA S12.50-2002 / ISO 3740:2000(Formerly ANSI S12.50-2002 / ISO 3740:2000) AMERICAN NATIONAL STANDARDAcoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards (A Nationally Adopted International Standard) Accredited Standards Committee S12, NoiseS
2、tandards Secretariat Acoustical Society of America35 Pinelawn Road, Suite 114 EMelville, NY 11747-3177 ANSI/ASA S12.50-2002 / ISO 3740:2000 (Formerly ANSI S12.50-2002 / ISO 3740:2000)Reaffirmed by ANSI on June 24, 2007 Reaffirmed by ANSI September 17, 2007 Reaffirmed by ANSI September 13, 2012 The A
3、merican National Standards Institute, Inc. (ANSI) is the national coordinator of voluntary standards development and the clearinghouse in the U.S.A. for information on national and international standards. The Acoustical Society of America (ASA) is an organization of scientists and engineers formed
4、in 1929 to increase and diffuse the knowledge of acoustics and to promote its practical applications. ANSI/ASA S12.50-2002 / ISO 3740:2000 (Formerly ANSI S12.50-2002 / ISO 3740:2000) AMERICAN NATIONAL STANDARD Acoustics Determination of sound power levels of noise sources Guidelines for the use of b
5、asic standards (A Nationally Adopted International Standard) Secretariat Acoustical Society of America Approved 12 July 2002 American National Standards Institute, Inc. (ANSI) Abstract This Nationally Adopted International Standard gives guidance for the use of a series of nine International Standar
6、ds describing various methods for determining the sound power levels from all types of machinery and equipment. It provides: - brief summaries of these basic International Standards; - guidance on the selection of one or more of these standards which are appropriate to any particular type (see claus
7、e 6 and annex D). The guidance given applies only to airborne sound. It is for use in the preparation of noise test codes (see ISO 12001) and also in noise testing where no specific noise test code exists. This Nationally Adopted International Standard is not intended to replace any of the details o
8、f, or add any additional requirements to, the individual test methods in the other basic standards referred to. AMERICAN NATIONAL STANDARDS ON ACOUSTICSThe Acoustical Society of America (ASA) provides the Secretariat for AccreditedStandards Committees S1 on Acoustics, S2 on Mechanical Vibration and
9、Shock,S3 on Bioacoustics, and S12 on Noise. These committees have wide represen-tation from the technical community (manufacturers, consumers, trade associa-tions, general interest, and government representatives). The standards are pub-lished by the Acoustical Society of America through the America
10、n Institute ofPhysics as American National Standards after approval by their respective stan-dards committees and the American National Standards Institute.These standards are developed and published as a public service to providestandards useful to the public, industry, and consumers, and to Federa
11、l, State andlocal governments.Each of the Accredited Standards Committees operating in accordance with pro-cedures approved by American National Standards Institute (ANSI) is responsiblefor developing, voting upon, and maintaining or revising its own standards. TheASA Standards Secretariat administe
12、rs committee organization and activity, andprovides liaison between the Accredited Standards Committees and ANSI. Afterthe standards have been produced and adopted by the Accredited StandardsCommittees, and approved as American National Standards by ANSI, the ASAStandards Secretariat arranges for th
13、eir publication and distribution.An American National Standard implies a consensus of those substantially con-cerned with its scope and provisions. Consensus is established when, in thejudgment of the ANSI Board of Standards Review, substantial agreement hasbeen reached by directly and materially af
14、fected interests. Substantial agreementmeans much more than a simple majority, but not necessarily unanimity. Consen-sus requires that all views and objections be considered, and that a concertedeffort be made toward their resolution.The use of an American National Standard is completely voluntary.
15、Their existencedoes not in any respect preclude anyone, whether he has approved the standardsor not, from manufacturing, marketing, purchasing, or using products, processes,or procedures not conforming to the standards.NOTICE: This American National Standard may be revised or withdrawn at anytime. T
16、he procedures of the American National Standards Institute require thataction be taken periodically to reaffirm, revise, or withdraw a standard.Standards SecretariatAcoustical Society of America35 Pinelawn Road, Suite 114 EMelville, NY 11747-3177USATelephone: 11 631 390 0215Fax: 11 631 390 0217E-Mai
17、l: asastdsaip.org 2002 by the Acoustical Society of America. This standard may not be reproduced in wholeor in part in any form for sale, promotion, or any commercial purpose, or any purpose notfalling within the provisions of the Copyright Act of 1976, without prior written permission ofthe publish
18、er. For permission, address a request to the Standards Secretariat of the Acous-tical Society of America.These materials are subject to copyright claims of ISO, IEC, ANSI, and ASA. No part of thispublication may be reproduced in any form, including an electronic retrieval system, withoutthe prior wr
19、itten permission of the Acoustical Society of America (ASA). All requests per-taining to this standard should be submitted to the Acoustical Society of America (ASA).ContentsPageForeword . iiiIntroduction v1 Scope . 12 Normative references . 13 Terms and definitions 24 Determination of sound power l
20、evels . 54.1 Reasons for the determination of sound power levels . 54.2 Methodology . 55 Noise declaration according to ISO 4871 66 Selection of the appropriate International Standard fordetermination of sound power levels 66.1 Quantities to be measured and determined 66.2 Considerations affecting c
21、hoice of method . 66.3 Synopses . 66.4 Test environments 66.5 Measurement uncertainty 76.6 Procedure for selection . 7AnnexesA (normative) Synopses of basic International Standards onsound power level determinations 11B (informative) Acoustical test environments 19C (informative) Factors affecting t
22、he choice of measurementmethod . 21D (informative) Guidance on the choice of appropriateInternational Standard for determining the sound power levelof a sound source . 23Bibliography . 25iForewordThis foreword is not part of the Nationally Adopted International Standard (NAIS), Acous-tics - Determin
23、ation of sound power levels of noise sources Guidelines for the use ofbasic standards, ANSI S12.50-2002, ISO 3740: 2000.This Nationally Adopted International Standard (NAIS) comprises a part of a groupof definitions, standards, and specifications for use in acoustical work. It has beenadopted by the
24、 American National Standards Institute utilizing the AccreditedStandards Committee Procedures, under the Secretariat of the Acoustical Societyof America.Accredited Standards Committee S12, Noise, under whose jurisdiction this NAISStandard was adopted, has the following scope:Standards, specification
25、s, and terminology in the field of acoustical noise per-taining to methods of measurement, evaluation, and control; including biologi-cal safety, tolerance, and comfort, and physical acoustics as related to envi-ronmental and occupational noise.This Standard is in harmony with International Standard
26、 ISO 3740: 2000, Acous-tics - Determination of sound power levels of noise sources Guidelines for theuse of basic standards, which was prepared by Technical Committee ISO/TC 43,Acoustics, Subcommittee SC 1, Noise.At the time this NAIS Standard was submitted to Accredited Standards CommitteeS12, Nois
27、e, for final approval, the membership was as follows:P. D. Schomer, ChairmanR. D. Hellweg, Vice ChairmanS. B. Blaeser, SecretaryAbbot Laboratories D.WaltonB. Muto (Alt.)Acoustical Society of America . B.M.BrooksW. J. Galloway (Alt.)Aearo Company . E.H.BergerAir-conditioning and Refrigeration Institu
28、te (ARI) . R.SeelM. Darbeau (Alt.)Alcoa, Inc. W.D.GallagherAmerican Academy of Otolaryngology, Head and NeckSurgery, Inc. R.A.DobieL. A. Michael (Alt.)American Industrial Hygiene Association . D.DriscollJ. Banach (Alt.)American Otological Society R.F.NauntonAmerican Speech-Hearing-Language Associati
29、on (ASHA) G.LinnR. Levinson (Alt.)Audio Engineering Society, Inc. . M.R.ChialD. Queen (Alt.)Bruel Gbe ISO 9614-1 and ISO 9614-2 describe methods for determining the sound power levels of machinery andequipment using sound intensity level measurements.b) Methods for the determination of emission soun
30、d pressure levels at work stations and at otherspecified positionsThis category includes the following standards:Gbe ISO 11200 gives guidelines for the choice of the method to be used;Gbe ISO 11201, ISO 11202 and ISO 11204 give methods for determining emission sound pressure levels ofmachinery and e
31、quipment from measured sound pressure levels;Gbe ISO 11203 gives methods for determining the emission sound pressure levels of machinery and equipmentfrom the sound power levels.ISO 3740:2000(E)vi ISO 2000 All rights reservedc) Noise test codesFor a particular family of machinery or equipment, a noi
32、se test code specifies the following:Gbe the methods and instruments to be used for the determination of the sound power level;Gbe the method to be used for the determination of emission sound pressure levels at work stations and/or at otherspecified positions;Gbe the positions of the work stations;
33、Gbe the mounting and operating conditions of the machine under test for the purpose of determining the noiseemission quantities;Gbe the method to be used for verifying declared noise emission quantities.ISO 12001 gives rules for the drafting and presentation of a noise test code.INTERNATIONAL STANDA
34、RD ISO 3740:2000(E) ISO 2000 All rights reserved 1Acoustics Determination of sound power levels of noisesources Guidelines for the use of basic standards1 ScopeThis International Standard gives guidance for the use of a series of nine International Standards describingvarious methods for determining
35、 the sound power levels from all types of machinery and equipment. It provides:Gbe brief summaries of these basic International Standards;Gbe guidance on the selection of one or more of these standards which are appropriate to any particular type (seeclause 5 and annex D). The guidance given applies
36、 only to airborne sound. It is for use in the preparation ofnoise test codes (see ISO 12001) and also in noise testing where no specific noise test code exists.This International Standard is not intended to replace any of the details of, or add any additional requirements to,the individual test meth
37、ods in the other basic standards referred to.These basic standards specify the acoustical requirements for measurements appropriate for different testenvironments and accuracies.It is important that specific test codes for various types of machinery and equipment be established and used inaccordance
38、 with the requirements of these basic International Standards. Such standardized noise test codes willrecommend the basic International Standard(s) to be used and will give detailed requirements on mounting andoperating conditions for a particular family to which the machine under test belongs.If no
39、 specific noise test code exists for a particular type of machinery, this International Standard is of use for thechoice of the most suitable of the basic standards. In all cases, the mounting and operating conditions of themachine under test should be in accordance with the general principles given
40、 in the basic standards.NOTE Two quantities which complement each other can be used to describe the sound emission of machinery orequipment. One is the emission sound pressure level at a specified position and the other is the sound power level. TheInternational Standards which describe the basic me
41、thods for determining emission sound pressure levels at the work stationand at other specified positions are the series ISO 11200 to ISO 11204.2 Normative referencesThe following normative documents contain provisions which, through reference in this text, constitute provisions ofthis International
42、Standard. For dated references, subsequent amendments to, or revisions of, any of thesepublications do not apply. However, parties to agreements based on this International Standard are encouraged toinvestigate the possibility of applying the most recent editions of the normative documents indicated
43、 below. Forundated references, the latest edition of the normative document referred to applies. Members of ISO and IECmaintain registers of currently valid International Standards.ISO 3741:1999, Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods fo
44、r reverberation rooms.ISO 3743-1, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 1: Comparison method for hard-walled test rooms.ISO 3740:2000(E)2 ISO 2000 All rights reservedISO 3743-2:199
45、4, Acoustics Determination of sound power levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Methods for special reverberationtest rooms.ISO 3744:1994, Acoustics Determination of sound power levels of noise sources using sound pr
46、essure Engineering method in an essentially free field over a reflecting plane.ISO 3745:1), Acoustics Determination of sound power levels of noise sources using sound pressure Precision methods for anechoic and hemi-anechoic rooms.ISO 3746:1995, Acoustics Determination of sound power levels of noise
47、 sources using sound pressure Survey method using an enveloping measurement surface over a reflecting plane.ISO 3747, Acoustics Determination of sound power levels of noise sources using sound pressure Comparison method in situ.ISO 9614-1:1993, Acoustics Determination of sound power levels of noise
48、sources using sound intensity Part 1: Measurement at discrete points.ISO 9614-2:1996, Acoustics Determination of sound power levels of noise sources using sound intensity Part 2: Measurement by scanning.ISO 12001, Acoustics Noise emitted by machinery and equipment Rules for the drafting and presenta
49、tion of anoise test code.IEC 61672-1, Electroacoustics Sound level meters Part 1: Specifications.3 Terms and definitionsFor the purposes of this International Standard, the following terms and definitions apply. More detailed definitionsmay be found in the ISO 3740 series (which includes ISO 3741 through ISO 3747), in ISO 9614-1 and ISO 9614-2and in noise test codes for specific types of machinery and equipment.3.1emissionairborne sound radiated by a well-defined noise source (e.g. the machine under test) under specified
