1、Reaffirmed by ANSI July 29, 1997 Reaffirmed by ANSI October 29, 2002 Reaffirmed by ANSI October 19, 2007 Reaffirmed by ANSI September 5, 2012 ( J ( J ANSI S12.12-1992 ASA 104-1922l J( AMERICAN NATIONAL STANDARD Engineering Method for the Determination of Sound Power Levels of Noise Sources Using Sou
2、nd Intensity ACCREDITED STANDARDS COMMITTEE S12, NOISE ABS TRACT This standard describes a method for in situ determination of the sound power level of noise sources in indoor or outdoor environments using sound intensity measure ments. The standard contains information on instrumentation, installation and oper ation of the source, procedures for the selection of a measurement surface, methods for the sampling of sound intensity on the measurement surface, procedures for the calculation of sound power level, and techniques that can be used to qualify the mea surement environment. J
