1、ANSI S12.10-2002ISO 7779: 1999AMERICAN NATIONAL STANDARDAcoustics Measurement of airborne noise emitted byinformation technology and telecommunicationsequipmentAccredited Standards Committee S12, NoiseStandards SecretariatAcoustical Society of America35 Pinelawn Road, Suite 114EMelville, New York 11
2、747-3177NAIS STANDARDANSIS12.10-2002ISO 7779: 1999Reaffirmed by ANSI October 19, 2007 Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-The American National Standards Institute, Inc. (ANS
3、I) is the nationalcoordinator of voluntary standards development and the clearinghouse in theU.S.A. for information on national and international standards.The Acoustical Society of America (ASA) is an organization of scientists andengineers formed in 1929 to increase and diffuse the knowledge of ac
4、ousticsand to promote its practical applications.Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI S12.10-2002ISO 7779: 1999AMERICAN NATIONAL STANDARDAcoustics - Measurement of airbor
5、ne noiseemitted by information technology andtelecommunications equipmentSecretariatAcoustical Society of AmericaApproved 21 November 2002American National Standards Institute, Inc.AbstractThis Nationally Adopted International Standard specifies methods for the measurement of airborne noise emitted
6、byinformation technology and telecommunications equipment. Hitherto, a wide variety of methods have been appliedby individual manufacturers and users to satisfy particular equipment or application needs. These diverse practiceshave, in many cases, made comparison of noise emission difficult. This Na
7、tionally Adopted International Standardsimplifies such comparisons and is the basis for the declaration of the noise emission levels of informationtechnology and telecommunications equipment.This Standard is the National Adoption of ISO 7779: 1999 and its amendment ISO 7779: 1999/FDAM 1.Copyright Ac
8、oustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMERICAN NATIONAL STANDARDS IN ACOUSTICSThe Acoustical Society of America (ASA) provides the Secretariat for Accredited Standards Committees S1on Acou
9、stics, S2 on Mechanical Vibration and Shock, S3 on Bioacoustics, and S12 on Noise. Thesecommittees have wide representation from the technical community (manufacturers, consumers, tradeassociations, general interest, and government representatives). The standards are published by theAcoustical Socie
10、ty of America through the American Institute of Physics as American National Standardsafter approval by their respective standards committees and the American National Standards Institute.These standards are developed and published as a public service to provide standards useful to the public,indust
11、ry, and consumers, and to Federal, State and local governments.Each of the Accredited Standards Committees operating in accordance with procedures approved byAmerican National Standards Institute (ANSI) is responsible for developing, voting upon, and maintaining orrevising its own standards. The ASA
12、 Standards Secretariat administers committee organization and activity,and provides liaison between the Accredited Standards Committees and ANSI. After the standards have beenproduced and adopted by the Accredited Standards Committees, and approved as American NationalStandards by ANSI, the ASA Stan
13、dards Secretariat arranges for their publication and distribution.An American National Standard implies a consensus of those substantially concerned with its scope andprovisions. Consensus is established when, in the judgment of the ANSI Board of Standards Review,substantial agreement has been reach
14、ed by directly and materially affected interests. Substantial agreementmeans much more than a simple majority, but not necessarily unanimity. Consensus requires that all viewsand objections be considered, and that a concerted effort be made toward their resolution.The use of an American National Sta
15、ndard is completely voluntary. Their existence does not in any respectpreclude anyone, whether he has approved the standards or not, from manufacturing, marketing, purchasing,or using products, processes, or procedures not conforming to the standards.NOTICE: This Nationally Adopted International Sta
16、ndard may be revised or withdrawn at any time. Theprocedures of the American National Standards Institute require that action be taken periodically to reaffirm,revise, or withdraw a standard.Standards SecretariatAcoustical Society of America35 Pinelawn Road, Suite 114EMelville, New York 11747-3177Te
17、lephone 631-390-0215FAX 631-390-0217E-mail asastdsaip.org 2002 by the Acoustical Society of America. This Nationally Adopted International Standard may not be reproduced in whole or in part in anyform for sale, promotion, or any commercial purpose, or any purpose not falling within the provisions of
18、 the Copyright Act of 1976, withoutprior written permission of the publisher. For permission, address a request to the Standards Secretariat of the Acoustical Society of America.These materials are subject to copyright claims of ISO, IEC, ANSI, and ASA. No part of this publication may be reproduced
19、in any form,including an electronic retrieval system, without the prior written permission of the Acoustical Society of America (ASA). All requestspertaining to this standard should be submitted to the Acoustical Society of America (ASA).Copyright Acoustical Society of America Provided by IHS under
20、license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Contents1 Scope . 12 Normative references . 23 Terms and definitions . 23.1 General definitions . 23.2 Acoustical definitions . 44 Conformance requirements . 55 Installation and operating conditions.5
21、5.1 Equipment installation 55.2 Input voltage and frequency.75.3 Equipment operation . 76 Method for determining sound power levels of equipment in reverberation rooms.86.1 General . 86.2 Measurement uncertainty . 86.3 Test environment . 96.4 Instrumentation . 96.5 Installation and operation of equi
22、pment: General requirements 106.6 Microphone positions and source locations.106.7 Measurement of sound pressure level106.8 Measurement of the sound pressure level of the reference sound source116.9 Calculation of space/time-averaged band sound pressure level.116.10 Calculation of sound power level.1
23、17 Method for determining sound power levels of equipment under essentially free-fieldconditions over a reflecting plane 137.1 General . 137.2 Measurement uncertainty . 137.3 Test environment 147.4 Instrumentation . 14Copyright Acoustical Society of America Provided by IHS under license with ASA Not
24、 for ResaleNo reproduction or networking permitted without license from IHS-,-,-7.5 Installation and operation of equipment: General requirements.157.6 Measurement surface and microphone positions.157.7 Measurement of sound pressure levels 167.8 Calculation of surface sound pressure level and sound
25、power level. 168 Method for measuring emission sound pressure levels at defined operator andbystander positions . 178.1 General . 178.2 Measurement uncertainty 178.3 Test environment . 178.4 Instrumentation . 188.5 Installation and operation of equipment 188.6 Microphone positions . 188.7 Measuremen
26、t of sound pressure levels .198.8 Calculation of the mean emission sound pressure level at the bystander positions . 209 Information to be recorded and reported . 219.1 Information to be recorded219.2 Test report . 24Annex A (normative) Test accessories 26Annex B (normative) Measurement surfaces 29A
27、nnex C (normative) Installation and operating conditions for specific equipment categories . 30Annex D (informative) Identification of prominent discrete tones 55Annex E (informative) Detection of impulsive sound pressure levels . 59Bibliography 61Copyright Acoustical Society of America Provided by
28、IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ForewordThis foreword is not part of the Nationally Adopted International Standard (NAIS), Acoustics Measurement of airborne noiseemitted by information technology and telecommunications equ
29、ipment, ANSI S12.10-2002, ISO 7779: 1999.This Nationally Adopted International Standard (NAIS) comprises a part of a group of definitions, standards, andspecifications for use in acoustical work. It has been adopted by the American National Standards Institute utilizingthe Accredited Standards Commi
30、ttee Procedure, under the Secretariat of the Acoustical Society of America.Accredited Standards Committee S12, Noise, under whose jurisdiction this Nationally Adopted InternationalStandard was adopted, has the following scope:Standards, specifications, and terminology in the field of acoustical nois
31、e pertaining to methods of measurement,evaluation, and control; including biological safety, tolerance, and comfort, and physical acoustics as related toenvironmental and occupational noise.This Standard is an exact adoption of International Standard ISO 7779: 1999, Acoustics - Measurement of airbor
32、nenoise emitted by information technology and telecommunications equipment. It also includes amendment ISO7779: 1999/FDAM 1 Noise measurement specification for CD/DVD-ROM drives, which at this writing is at theFDIS stage. International Standard ISO 7779: 1999 and its amendment ISO 7779: 1999/FDAM 1
33、were prepared byTechnical Committee ISO/TC 43, Acoustics, Subcommittee SC 1, Noise.At the time this NAIS Standard was submitted to Accredited Standards Committee S12, Noise, for final approval,the membership was as follows:P.D. Schomer, ChairmanR.D. Hellweg, Vice ChairmanS. B. Blaeser SecretaryAcous
34、tical Society of America . B.M. BrooksW.J. Galloway (Alt.)Aearo Company . E.H. BergerAir-Conditioning and Refrigeration Institute (ARI) . R. SeelM. Darbeau (Alt.)Aluminum Company of America (ALCOA) W.D. GallagherAmerican Industrial Hygiene Association . D. DriscollJ. Banach (Alt.)American Speech-Hea
35、ring-Language Association (ASHA) . G. LinnR. Levinson (Alt.)Audio Engineering Society, Inc. M.R. ChialD. Queen (Alt.)Bruel & Kjaer Instruments, Inc. M. AlexanderJ. Chou (Alt.)Caterpillar, Inc. . K.G. MeitlD.G. Roley (Alt.)Compressed Air and Gas Institute (CAGI) . J.H. AddingtonD.R. Bookshar (Alt.)Co
36、uncil for Accreditation in OccupationalHearing Conservation (CAOHC) . R.D. BruceE.H. Berger (Alt.)Howard Leight Industries . V. LarsonE. Woo (Alt.)International Safety Equipment Association . J. BirknerJ.C. Bradley (Alt.)Copyright Acoustical Society of America Provided by IHS under license with ASA
37、Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Information Technology Industry Council (ITI) . R.D. HellwegW.H. Johnson (Alt.)Institute of Noise Control Engineering B. TinianovM. Lucas (Alt.)James, Anderson & Associates (JAA) . L.D. HagerR.R. Anderson (Alt.)Larson
38、 Davis Laboratories L. DavisL. Harbaugh (Alt.)National Council of Acoustical Consultants J. ErdreichNational Hearing Conservation Association (NHCA) . K. MichaelNoise Pollution Clearinghouse L. BlombergNorth American Insulation Manufacturers Assoc. . R. GodfreyPlantronics, Inc. . K. A. WooPower Tool
39、 Institute, Inc. S. BroadbentJ. Nosko (Alt.)U.S. Air Force . R.L. McKinleyU.S. Army Aeromedical Research Lab W. AhroonD. Ostler (Alt.)U.S. Army Construction EngineeringResearch Laboratories (USA-CERL) L. PaterU.S. Army, Center for Health Promotionand Preventive Medicine G.A. LuzW.A. Russell (Alt.)U.
40、S. Army Human Research & Engineering Directorate J. KalbT.R. Letowski (Alt.)U.S. Department of Transportation A. KonheimU.S. Naval Surface Warfare Center . S.A. FisherJ. Niemiec (Alt.)Individual Experts of Accredited Standards Committee S12, Noise, were:P.K. BaadeR.W. BensonL.L. BeranekE.H. BergerS.
41、H.P. BlyB.M. BrooksK.M. EldredL.S. FinegoldW.J. GallowayR.D. HellwegR.K. HillquistW.W. LangG.C. Maling, Jr.A.H. MarshR.J. PeppinJ. PopeL.H. RoysterP.D. SchomerJ.P. SeilerL.C. SutherlandW.R. ThortonH.E. von GierkeL.A. WilberG. WinzerG.S.K. WongR.W.YoungCopyright Acoustical Society of America Provided
42、 by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Working Group S12-3, Measurement of Noise from Information Technology and Telecommunications Equipment(parallel to ISO/TC 43/SC 1/WG 23), which assisted Accredited Standards Committee S1
43、2, Noise, in thepreparation of this Standard, had the following membership:K.X.C. Man -ChairM. Beltman D. QuinlanE. Dunens C. SaunderR. Hellweg J. SchmittR. Lotz R. UnderwoodM. Nobile L. WittigR. Peppin J. WongSuggestions for improvement of this Standard will be welcomed. They should be made in writ
44、ing to AccreditedStandards Committee S12, Noise, in care of the Standards Secretariat, Acoustical Society of America, 35 PinelawnRoad, Suite 114E, Melville, New York 11747-3177.Telephone: 631-390 -0215FAX: 631-390 -0217E-mail asastdsaip.orgCopyright Acoustical Society of America Provided by IHS unde
45、r license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Acoustical Society of Amer
46、ica Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Copyright Acoustical Society of America Provided b
