ASME PTC 36 pdf download Measurement of Industrial Noise Performance Test Codes 3-1 CHOICE OF METHODs Procedures described in ANSI/ASA S1.13 and ANSI/ASA S12.18 shall be used to measure airborne sound-pressurelevels in a near field or far field under any conditions.ANSI/ASA S1.13 is primarily for indoor sound measurements,although it can be used outdoors,and ANSI/ASAS12.18 applies only to outdoor environments.Ifthesound-powerlevelofoutdoor sources...