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ANSI S12.32 : 0

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

PRECISION METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF DISCRETE-FREQUENCY AND NARROW-BAND NOISE SOURCES IN REVERBERATION ROOMS
Available format(s)

Hardcopy , PDF

Superseded date

12-07-2002

Language(s)

English

INTRODUCTION
1 GENERAL
    1.1 Scope and Purpose
    1.2 Applicability
    1.3 Measurement Uncertainty
    1.4 Principal Requirements
    1.5 Other Requirements
2 DEFINITIONS AND SYMBOLS
    2.1 Definitions
    2.2 Symbols and Recommended Units
3 DETERMINATION OF THE SIGNIFICANCE OF DISCRETE-
    FREQUENCY COMPONENTS AND NARROW BANDS OF NOISE
    3.1 General
    3.2 Qualitative Procedure
    3.3 Estimate of Standard Deviation
4 NUMBER OF MICROPHONE POSITIONS AND NOISE SOURCE
    LOCATIONS
    4.1 Introduction
    4.2 General
    4.3 Computational Procedures
5 ALTERNATIVE QUALIFICATION PROCEDURE FOR THE
    MEASUREMENT OF DISCRETE-FREQUENCY COMPONENTS
    5.1 Introduction
    5.2 General
    5.3 Instrumentation
    5.4 Loudspeaker Test
    5.5 Room Test
    5.6 Computational Procedure
    5.7 Qualification
    5.8 Multiple Source Locations
6 REFERENCES
    6.1 General References
    6.2 Text References
    6.3 Bibliography
TABLES
TABLE 1 Estimated standard deviation of sound power
          level determination for discrete-frequency and
          narrow-band noise sources in reverberation rooms
TABLE II Characterization of the presence of discrete-
          frequency or narrow-band components, based upon
          the spatial variation of the sound field
TABLE III Number of microphone positions required and
          values of the constant K for determining
          number of noise source locations
TABLE IV Maximum allowable sample standard deviations, s,
TABLE V Test frequencies for alternative qualification
          of reverberation room facility for measuring
          sound power levels of noise sources containing
          significant discrete-frequency components
          

Specifies the additional requirements, above and beyond those of ANSI S12.31, that are necessary for accurate determinations of the sound power level when discrete frequencies or narrow bands of noise are radiated by a source.

Committee
ASA
DevelopmentNote
Revision of ANSI S1.32-1980
DocumentType
Standard
Pages
28
PublisherName
Acoustical Society of America
Status
Superseded
Supersedes

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ASTM E 1704 : 1995 : R2002 Standard Guide for Specifying Acoustical Performance of Sound-Isolating Enclosures
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ISO 3742:1988 Acoustics — Determination of sound power levels of noise sources — Precision methods for discrete-frequency and narrow-band sources in reverberation rooms
ISO 3744:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for an essentially free field over a reflecting plane
ANSI S1.36 : 1979 SOUND POWER LEVELS OF NOISE SOURCES, SURVEY METHODS FOR THE DETERMINATION OF,
ISO 3747:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering/survey methods for use in situ in a reverberant environment
ISO 3740:2000 Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards
ANSI S12.31 : 0 PRECISION METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF BROAD-BAND NOISE SOURCES IN REVERBERATION ROOMS
ANSI S1.34 : 1980 FREE-FIELD CONDITIONS OVER A REFLECTING PLANE, ENGINEERING METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES FOR ESSENTIALLY,
ISO 3746:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Survey method using an enveloping measurement surface over a reflecting plane
ISO 6926:2016 Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ANSI S1.35 : 1979 SOUND POWER LEVELS OF NOISE SOURCES IN ANECHOIC AND SEMI-ANECHOIC ROOMS, DETERMINATION OF,
ISO 3741:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for reverberation test rooms
ISO 3745:2012 Acoustics — Determination of sound power levels and sound energy levels of noise sources using sound pressure — Precision methods for anechoic rooms and hemi-anechoic rooms
ANSI S12.35:1990(R1996) PRECISION METHODS FOR THE DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES IN ANECHOIC AND HEMI-ANECHOIC ROOMS
ANSI S12.30 : 0 GUIDELINES FOR THE USE OF SOUND POWER STANDARDS AND FOR THE PREPARATION OF NOISE TEST CODES

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