ANSI S12.32 : 0

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.