1、AMERICAN NATIONAL STANDARDMETHOD FOR MEASURINGTHE PERFORMANCE OF NOISEDISCRIMINATINGAND NOISE CANCELINGMICROPHONESAccredited Standards Committee S1, AcousticsStandards SecretariatAcoustical Society of America120 Wall Street, 32nd FloorNew York, New York 10005-3993ANSI S1.16-2000ANSIS1.16-2000Copyrig
2、ht 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. (ANSI) is the na-tional coordinator of voluntary standards development and the clear-ing house in
3、 the U.S. for information on national and internationalstandards.The Acoustical Society of America (ASA) is an organization of sci-entists and engineers formed in 1929 to increase and diffuse theknowledge of acoustics and to promote its practical applications.Copyright Acoustical Society of America
4、Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-American National StandardMethod for Measuring the Performance ofNoise Discriminating and Noise CancelingMicrophonesSecretariatAcoustical Society of AmericaApproved 19 May 2000Am
5、erican National Standards Institute, Inc.AbstractThis American National Standard describes procedures for measuring the performance of noisediscriminating and noise canceling microphones. The signal-to-noise ratio is measured at 1/3 octave bandintervals with the desired test source in a diffuse nois
6、e field. The noise canceling performance of themicrophone is defined as the noise canceling index (NCI), a weighted summation of the signal-to-noiseratios. The NCI of the microphone under test can be compared to the required baseline NCI of a laboratorystandard pressure microphone.ANSI S1.16-2000Cop
7、yright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-AMERICAN NATIONAL STANDARDS ON ACOUSTICSThe Acoustical Society of America (ASA) provides the Secretariat for AccreditedStandards Committees S
8、1 on Acoustics, S2 on Mechanical Vibration and Shock,S3 on Bioacoustics, and S12 on Noise. These committees have wide represen-tation from the technical community (manufacturers, consumers, and general-interest representatives). The Standards are published by the Acoustical Societyof America through
9、 the American Institute of Physics as American National Stan-dards after approval by their respective standards committees and the AmericanNational Standards Institute.These standards are developed and published as a public service to providestandards useful to the public, industry, and consumers, a
10、nd to Federal, State,and local governments.Each of the Accredited Standards Committees (operating in accordance with pro-cedures approved by ANSI) is responsible for developing, voting upon, and main-taining or revising its own Standards. The ASA Standards Secretariat administerscommittee organizati
11、on and activity, and provides liaison between the AccreditedStandards Committees and ANSI. After the Standards have been produced andadopted by the Accredited Standards Committees, and approved as AmericanNational Standards by ANSI, the ASA Standards Secretariat arranges for theirpublication and dis
12、tribution.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 affected interests. Subst
13、antial 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 American National Standards is completely voluntary. Their existencedoes not in
14、 any respect preclude anyone, whether he or she has approved theStandards or 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. The procedures of th
15、e American National Standards Institute require thataction be taken periodically to reaffirm, revise, or withdraw this Standard.Standards SecretariatAcoustical Society of America120 Wall Street, 32nd FloorNew York, New York 10005-3993USATelephone: 11 212 248-0373Telefax: 11 212 248-0146E-mail: asast
16、dsaip.orgInternet: http:/asa.aip.org 2000 by the Acoustical Society of America. This Standard may not be reproduced inwhole or in part in any form for sale, promotion, or any commercial purpose, or any purposenot falling within the provisions of the Copyright Act of 1976, without prior written permi
17、ssionof the publisher. For permission, address a written request to the Standards Secretariat ofthe Acoustical Society of America.Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-Contents
18、PageForeword . ii1 Scope, Purpose, and Applications 11.1 Scope . 11.2 Purpose . 11.3 Applications . 12 Normative References 13 Definitions . 13.1 Noise Canceling Microphone 13.2 Noise Discriminating Microphone . 13.3 Microphone System 13.4 Test Volume . 13.5 Bandwidth . 23.6 Diffuse Random Pink Nois
19、e Field 23.7 Signal-To-Noise Ratio (SNR) 33.8 Weighted Signal-To-Noise Ratio . 33.9 Noise Canceling Index (NCI) . 34 Diffuse Field Method 34.1 Physical Requirements 34.2 Test Procedure 34.3 Reporting Data . 4Tables1Allowable random incidence field response variation forcorresponding microphone free-
20、field rejection 42Method for calculation of the Weighted SNR (WSNR) . 4Figure1Test geometry . 2iCopyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ForewordThis Foreword is for information o
21、nly and is not an integral part of American NationalStandard Method for Measuring the Performance of Noise Discriminating and Noise Can-celing Microphones, ANSI S1.16-2000.Noise canceling microphones are used in numerous applications where improvedsignal-to-noise ratios are important for speech comm
22、unication and/or other audioapplications. Arrays of microphones connected together by hardware and/or soft-ware can also improve the signal-to-noise ratio. This Standard addresses theneed to have a standard methodology to measure the performance of these typesof devices.This Standard was developed u
23、nder the jurisdiction of Accredited Standards Com-mittee S1, Acoustics, which has the following scope:Standards, specifications, methods of measurement and test, and terminologyin the fields of physical acoustics including architectural acoustics, electroa-coustics, sonics and ultrasonics, and under
24、water sound, but excluding thoseaspects which pertain to biological safety, tolerance, and comfort.At the time this Standard was submitted to Accredited Standards Committee S1,Acoustics, for approval, the membership was as follows:G. S. K. Wong, ChairT. J. Kuemmel, Vice ChairA. Brenig, SecretaryAcou
25、stical Society of America G.S.K.WongT. J. Kuemmel (Alt.)Air-Conditioning and Refrigeration Institute ARI R.ComparinS. R. Sanders (Alt.)American Industrial Hygiene Association AIHA . L.H.RoysterJ. F. Meagher (Alt.)Audio Engineering Society L.W.SepmeyerM. R. Chial (Alt.)Bruel ISO/TC 108/SC1, Balancing
26、, including Balancing Machines, ISO/TC 108/SC2 Measurementand Evaluation of Mechanical Vibration and Shock as Applied to Machines, Ve-hicles, and Structures; ISO/TC 108/SC3 Use and Calibration of Vibration andShock Measuring Instruments; ISO/TC 108/SC5 Condition Monitoring and Diag-nostics of Machin
27、es; and ISO/TC 108/SC6 Vibration and Shock Generating Sys-tems.ASACOS and the ASA Standards Secretariat provide the Secretariat for the U.S.Technical Advisory Groups listed above and administer the International Secre-tariat for ISO/TC 108 Mechanical Vibration and Shock, ISO/TC 108/SC1 Balanc-ing, i
28、ncluding Balancing Machines, and ISO/TC 108/SC5 Condition Monitoringand Diagnostics of Machines.Standards are produced in four broad areas: physical acoustics, mechanical vi-bration and shock, bioacoustics, and noise, and are reaffirmed or revised everyfive years. The latest information on current A
29、NSI standards including NationallyAdopted International Standards (NAIS Standards), as well as those under prepa-ration is available from the ASA Standards Secretariat. For information, pleasecontact A. Brenig, Standards Manager, Acoustical Society of America, 120 WallStreet, 32nd Floor, New York, N
30、Y 10005-3993, USA. E-mail asastdsaip.org.Telephone 11 212 248 0373, Telefax 11 212 248 0146, Internet http:/asa.aip.orgCopyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-MEMBERSHIP OF THE A
31、SA COMMITTEE ON STANDARDS ASACOS D. L. Johnson, Chair andASA Standards DirectorInteractive Acoustics, Inc.4719 Mile High DriveProvo, Utah 84604-6305Tel: 11 801 224 6442Fax: 11 801 224 6386E-mail: P. D. Schomer, Vice ChairUSA CERLATTN: LLPP.O. Box 9005Champaign, IL 61826-9005Tel: 11 217 373 7229Fax:
32、11 217 373 7251E-mail: schomeruiuc.eduA. Brenig, Standards ManagerStandards SecretariatAcoustical Society of America120 Wall Street, 32nd FloorNew York, NY 10005-3993Tel: 11 212 248 0373Fax: 11 212 248 0146E-mail: asastdsaip.orgRepresentation S1, AcousticsG. S. K. Wong, Chair, S1ASA Representative,
33、S1T. J. Kuemmel, Vice Chair, S1ASA Alternate Representative, S1Representation S2, MechanicalVibration and ShockR. J. Peppin, Chair, S2D. J. Evans, Vice Chair, S2S. I. Hayek, ASA Representative, S2B. E. Douglas, ASA AlternateRepresentative, S2Representation S3, BioacousticsR. F. Burkard, Chair, S3ASA
34、 Representative, S3J. Franks, Vice Chair, S3ASA Alternate Representative, S3Representation S12, NoiseP. D. Schomer, Chair, S12R. Hellweg, Vice Chair, S12B. M. Brooks, ASA Representative, S12W. J. Galloway, ASAAlternate Representative, S12ASA Technical CommitteeRepresentationE. C. Shang, AcousticalOc
35、eanographyA. E. Bowles, Animal BioacousticsG. E. Winzer, ArchitecturalAcousticsR. O. Cleveland, Bioresponseto Vibration and to UltrasoundM. D. Burkhard, EngineeringAcousticsI. M. Lindevald, Musical AcousticsR. Peppin, NoiseS. I. Madanshetty, PhysicalAcousticsC. Rankovic, Psychological andPhysiologic
36、al AcousticsD. Kewley-Port, SpeechCommunicationL. A. Herstein III, StructuralAcoustics and VibrationA. L. Van Buren, UnderwaterAcousticsEx Officio Members of ASACOS nonvoting M. Pierucci, Chair, ASA Technical CouncilD. Feit, ASA TreasurerT. F. W. Embleton, Past Chair ASACOSC. E. Schmid, ASA Executiv
37、e DirectorU. S. Technical Advisory Group TAG Chairs for International Technical Committees nonvoting P. D. Schomer, Chair, U. S. TAG, ISO/TC 43V. Nedzelnitsky, Chair, U. S. TAG, IEC/TC 29D. J. Evans, Chair, U. S. TAG, ISO/TC 108Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-ANSI S1.16-2000Copyright Acoustical Society of America Provided by IHS under license with ASA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-
