1、 ANSI/ASA S12.43-1997 (Formerly ANSI S12.43-1997) AMERICAN NATIONAL STANDARDMethods for Measurement of Sound Emitted by Machinery and Equipment at Workstations and Other Specified PositionsAccredited Standards Committee S12, NoiseStandards Secretariat Acoustical Society of America35 Pinelawn Road, S
2、uite 114 EMelville, NY 11747-3177ANSI/ASA S12.43-1997 (Formerly ANSI S12.43-1997)Reaffirmed by ANSI July 17, 2002 Reaffirmed by ANSI September 11, 2007 Reaffirmed by ANSI September 11, 2007 Reaffirmed by ANSI July 17, 2002 Reaffirmed by ANSI September 5, 2012 The American National Standards Institut
3、e, Inc. (ANSI) is the national coordinator of voluntary standards development and the clearinghouse in the U.S.A. for information on national and international standards. The Acoustical Society of America (ASA) is an organization of scientists and engineers formed in 1929 to increase and diffuse the
4、 knowledge of acoustics and to promote its practical applications. ANSI/ASA S12.43-1997 (Formerly ANSI S12.43-1997) AMERICAN NATIONAL STANDARD Methods for Measurement of Sound Emitted by Machinery and Equipment at Workstations and Other Specified Positions Secretariat Acoustical Society of America A
5、pproved 27 January 1997 American National Standards Institute, Inc. Abstract This Standard provides three methods to measure sound pressure levels from all types of machinery and equipment at workstations and other specified positions. The first method applies to measurements in an essentially free
6、field over a reflecting plane. These sound pressure levels are, in general, equal to or lower than those that would occur when the machine is operated in its normal surroundings as the effects of background noise or reflections from surfaces other than the mounting surface are excluded. The second m
7、ethod applies to measurements in normal operating environments where the effects of background noise and reflections from surfaces surrounding the machine are accounted for in the measurements. The third method is a survey method of measurement for sound sources operating in their normal environments when less-accurate measurements are acceptable.
