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1、AS 1217.11985 Australian Standard ACOUSTICSDETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES Part 1GUIDELINES FOR THE USE OF BASIC STANDARDS FOR THE PREPARATION OF NOISE TEST CODES Licensed to mark b bell on 19 Aug 2005. 1 user personal user licence only. Storage, distribution or use on network p
2、rohibited. This Australian standardwaspreparedby Committee AK/2,Techniquesfor Measurement. It was approved on behalf of the Council of the Standards Association of Australia on 30 August 1984 and published on 31 January 1985. The following interests are represented on Committee AK/2: Australian Acou
3、stical Society CSIRO, Division of Building Research CSIRO, National Measurement Laboratory Department of Aviation Department of Industrial Relations, N.S.W. Department of Housing and Construction Environment Protection Authority of Victoria Metal Trades Industry Association of Australia National Aco
4、ustic Laboratories Telecom Australia University of Adelaide University of Queensland Review of Australian Standards. To keep abreast of progress in industry, Australian Standards are subject to periodic review and are kept up to date by the issue of amendments or new editions as necessary. It is imp
5、ortant therefore that Standards users ensure that they are in possession of the latest edition, and any amendments thereto. Full details of all Australian Standards and related publications will be found in the Standards Australia Catalogue of Publications; this information is supplemented each mont
6、h by the magazine The Australian Standard, which subscribing members receive, and which gives details of new publications, new editions and amendments, and of withdrawn Standards. Suggestions for improvements to Australian Standards, addressed to the head office of Standards Australia, are welcomed.
7、 Notificationof any inaccuracy or ambiguity found in an Australian Standard should be made without delay in order that the matter may be investigated and appropriate action taken. This Standard was issued in draft form for comment as DR 82052. Licensed to mark b bell on 19 Aug 2005. 1 user personal
8、user licence only. Storage, distribution or use on network prohibited. AS 1217.11985 Australian Standard ACOUSTICSDETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES Part 1GUIDELINES FOR THE USE OF BASIC STANDARDS FOR THE PREPARATION OF NOISE TEST CODES First published (as AS 1217). . . . . . . . .
9、 . . . . .1972 AS 1217.1 first published . . . . . . . . . . . . . . . . .1985 PUBLISHED BY STANDARDS AUSTRALIA (STANDARDS ASSOCIATION OF AUSTRALIA) 1 THE CRESCENT, HOMEBUSH, NSW 2140 ISBN 0 7262 3589 X Licensed to mark b bell on 19 Aug 2005. 1 user personal user licence only. Storage, distribution
10、or use on network prohibited. AS 1217.119852 PREFACE This standard was prepared by the Associations Committee on Techniques for Measurement. It supersedes AS 12171972, Methods of Measurement of Airborne Sound Emitted by Machines. This standard is based on ISO3740, AcousticsDetermination of Sound Pow
11、er Levels of Noise SourcesGuidelines for the Use of Basic Standards and for the Preparation of Noise Test Codes. CONTENTS Page FOREWORD. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 SECTION 1. SCOPE AND GENERAL 1.1Scope . . . . . . . . . . . . . . . . . . .
12、. . . . . . . . . . . . . . . . . . . . . . . .5 1.2Field of Application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 1.3Referenced Documents. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 SECTION 2. SELECTION OF APPROPRIATE BASIC STANDARD FOR DETERMINATION OF SOUND P
13、OWER LEVEL 2.1Quantities to be Measured and Determined. . . . . . . . . . . . . . . .6 2.2Considerations Affecting Choice of Measurement Method . . . . . .6 2.3Synopsis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 2.4Test Environments. . . . . . . . . . . . . . . .
14、 . . . . . . . . . . . . . . . . .6 2.5Procedure for Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6 SECTION 3. PREPARATION OF NOISE TEST CODES 3.1General. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 3.2Use of Basic Standards. . . . . . . .
15、 . . . . . . . . . . . . . . . . . . . . . .9 3.3Data Presentation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9 APPENDICES ASynopses of the Basic Standards on Sound Power Level Determinations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10 BFactors Af
16、fecting Choice of Measurement Method. . . . . . . . . . .13 CAcoustical Test Environments . . . . . . . . . . . . . . . . . . . . . . . . . .15 DPreferred Format for Reporting Octave and One-third Octave Band Sound Power Levels . . . . . . . . . . . . . . . . . . . . . . . . . . . .16 Licensed to ma
17、rk b bell on 19 Aug 2005. 1 user personal user licence only. Storage, distribution or use on network prohibited. 3AS 1217.11985 STANDARDS ASSOCIATION OF AUSTRALIA Australian Standard for ACOUSTICSDETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES PART 1GUIDELINES FOR THE USE OF BASIC STANDARDS FOR
18、 THE PREPARATION OF NOISE TEST CODES FOREWORD This standard is one of a series setting out various methods for determining the sound power levels of machines and equipment. The most important factor in the selection of a noise measurement method is the ultimate use of the data that are to be obtaine
19、d. This standard introduces a series of six other standards being published as AS 1217.2 to AS 1217.7, describing various methods for determining the sound power levels of machines and equipment. Sound power level data are useful for (a)calculating the approximate sound pressure level at a given dis
20、tance from a machine operating in a specified environment; (b) comparing the noise radiated by machines of the same type and size; (c)comparing the noise radiated by machines of different types and sizes; (d) determining whether a machine complies with a specified upper limit of sound emission; (e)p
21、lanning in order to determine the amount of transmission loss or noise control required under certain circumstances; and (f)engineering work to assist in developing quiet machinery and equipment. The sound power level of a source is essentially independent of the environment in which the source is o
22、perating. This is one of the reasons for using sound power level of characterize the noise emitted by various types of machines and equipment. These basic standards specify the acoustical requirements for measurements of sound power appropriate for different test environments and accuracies. Where t
23、hese basic standards are applied to sound measurements on specific machines, it is necessary to decide which one of the basic standards is most appropriate for the particular class of machine or equipment, and for the purpose of the test it is also necessary to decide on specific details for mountin
24、g and operating the machine to be tested within the general principles stated in the basic documents. Guidelines for making these decisions are provided in this standard. These guidelines are essential to the proper application of the basic acoustical measurement standards and to the preparation of
25、specific sound test codes for various types of machines and equipment. If no specific sound test code exists for a particular type of machine, the most suitable of the basic documents should be followed and the mounting and operating conditions used should be described in the test report. These cond
26、itions should be in accordance with the general principles given in the basic documents. Control of noise from machines or equipment requires effective exchange of acoustical information among the several parties concerned. These include the manufacturer, specifier, installer and user of the machine
27、 or equipment. This acoustical information is obtained from measurements. These measurements are useful only if they are carried outunderspecifiedconditionstoobtaindefinedacousticalquantitiesusing standardized instruments. The set of basic standards being published as parts of AS 1217, for which thi
28、s standard serves as the introduction, includes the following: Part 2Precision Methods for Broad-band sources in Reverberation Rooms Part 3Precision Methods for Discrete-frequency and Narrow-band Sources in Reverberation Rooms Part 4Engineering Methods for Special Reverberation Test Rooms Licensed t
29、o mark b bell on 19 Aug 2005. 1 user personal user licence only. Storage, distribution or use on network prohibited. AS 1217.119854 Part 5Engineering Methods for Free-field Conditions over a Reflecting Plane Part 6Precision Methods for Anechoic and Hemi-anechoic Rooms Part 7Survey Method Additional
30、standards may be added to the series in the future. In principle, the methods of measurement set out in AS 1217.2 to AS 1217.7 cover all types of machines and equipment. For noise measurements on a particular kind and size of machine or equipment, or when only certain kinds of facilities are availab
31、le for the measurements, only one of these standards may be applicable. For type testing, only one method should be prescribed. The basic standards prescribe the acoustical conditions for the noise measurements and the instruments to be used. Only general information is given on the installation and
32、 operation of the sound source during the measurements. Different types of machines and equipment require more detailed instructions concerning the installation and operation of the equipment during the noise tests. Licensed to mark b bell on 19 Aug 2005. 1 user personal user licence only. Storage,
33、distribution or use on network prohibited. 5AS 1217.11985 SECTION 1. SCOPE AND GENERAL 1.1 SCOPE. Thisstandardprovidesguidelines comprising the following: (a)Brief explanations of the principles underlying thesetofbasicstandards,publishedas AS 1217.2 to AS 1217.7, for measuring the noise emitted by
34、machines and equipment. (b) Assistance in the selection of the appropriate basic standard. (c)General information on supplementing the basic standardswithinstructionsconcerningthe installation and operating conditions for the particular type of machines or equipment; such instructions are usuallyinc
35、orporatedin test codes. 1.2 FIELD OF APPLICATION. These guidelines are applicable to the preparation of all noise test codes for any type of machine or equipment, with the exception of moving vehicles or other non-stationary equipment. These guidelines apply only to airborne sound and are applicable
36、 only to test codes requiring the determination of sound power levels of noise sources. 1.3 REFERENCEDDOCUMENTS. The following documents are referred to in this standard: AS 1217.2AcousticsDeterminationofSound Power Levels of Noise Sources, Part 2Precision Methods for Broad- band sources in Reverber
37、ation Rooms AcousticsDeterminationofSound Power Levels of Noise Sources, Part 3Precision Methods for Discrete- frequencyandNarrow-band SourcesinReverberation Rooms Acoustics-DeterminationofSound Power Levels of Noise Sources, Part 4EngineeringMethodsfor SpecialReverberationTest Rooms AcousticsDeterm
38、inationofSound Power Levels of Noise Sources, Part 5Engineering Methods for Free- fieldConditionsovera Reflecting Plane AcousticsDeterminationofSound Power Levels of Noise Sources, Part 6Precisi onMethodsfo r Anechoicand Hemi-anechoic Rooms AcousticsDeterminationofSound Power Levels of Noise Sources
39、, Part 7Survey Method AS 1633Glossary of Acoustic Terms SAA MP44 Guide for the Use of Sound Measuring Equipment Part 1Portable Sound Level Meters* ISO 2204AcousticsGuidetoInternational StandardsontheMeasurementof AirborneAcousticalNoiseand Evaluation of its Effects on Human Beings IEC 263Scales and
40、Sizes for Plotting Frequency Characteristics and Polar Diagrams. * SAA MP44, Part 1, is in course of revision and is to be issued as AS 2659, Part 1. COPYRIGHT Licensed to mark b bell on 19 Aug 2005. 1 user personal user licence only. Storage, distribution or use on network prohibited. AS 1217.11985
41、6 SECTION 2. SELECTION OF APPROPRIATE BASIC STANDARD FOR DETERMINATION OF SOUND POWER LEVEL 2.1 QUANTITIES TOBEMEASURED AND DETERMINED.Methodsareprescribedfor measuringthesoundpressurelevels,either A-weighted or in frequency bands, in a specified acoustical environment. From these data, the sound po
42、wer level of the source is calculated either as an A-weighted value or in frequency bands. NOTE: Other frequency-weightings such as C-weighting may giveadditionalinformationconcerninglow-frequency components. The sound power levels are mean values obtained by time and space averaging. For certain ki
43、nds of noise and under certain measurement conditions, it is useful to supplementthe sound power level data with information concerning fluctuations of the values in both space and time. NOTE: Time-weighting characteristics such as impulse may give additional information concerning impulsive compone
44、nts. 2.2 CONSIDERATIONS AFFECTING CHOICE OF MEASUREMENTMETHOD. The applicability of the basic standards is determined by the following: (a)Thesizeofthenoisesourcewhich,for laboratory measurements, is given in terms of the percentage of test room volume. (b) Thetestenvironmentavailableforthe measurem
45、ents. (c)The character of the noise produced by the source, e.g. broad-band, narrow-band, discrete frequency, steady, non-steady, impulsive. (d) Frequency range of interest. (e)The highest grade of accuracy required. (f)The acoustical data required including the sound powerleveldataandotheracoustica
46、l information, e.g. directivity of source, temporal pattern. NOTE: AS 1633, SAA MP44, Part 1, and ISO 2204 may be referred to for guidance on the above terms. 2.3 SYNOPSIS. SynopsesofAS1217.2to AS 1217.7 are to be found in Appendix A. 2.4 TEST ENVIRONMENTS. For descriptions of the several test envir
47、onments described in AS 1217.2 toAS1217.7,referenceshouldbemadeto Appendix C. 2.5 PROCEDURE FOR SELECTION. Table 2.1 summarizes the applicability of each of the series of thesixbasicstandards.Table2.2givesthe uncertainties involved in the determinations of the soundpowerlevelsaccordingtothesebasic s
48、tandards. Measurements made in conformity with these basic standards tend to result in standard deviations which are equal to or less than those given in Table 2.2. The standarddeviationsofTable2.2reflectthe cumulative effects of all causes of measurement uncertainty, excluding those variations in t
49、he sound power level from test to test which may be caused for example, by changes in the mounting or operating conditionsofthesource.Theinter-laboratory reproducibility and repeatability of the test results may be considerably better, i.e. smaller standard deviations, than the uncertainties given in Table 2.2 would indicate. The purpose for which the noise measurements are to be made determines the grade of accuracy required. The several factors influencing the selection of an appropriate test method are shown in Table 2.3. This tablegivesguidancefor