ANSI/ASA S12.56-2011
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

Standard No.

ANSI/ASA S12.56-2011

Release Date

2011

Published By

American National Standards Institute （ANSI)

Latest

ANSI/ASA S12.56-2011

Scope

This National Standard specifies methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured on a surface enveloping a noise source (machinery or equipment) in a test environment for which requirements are given. The sound power level (or, in the case of noise bursts or transient noise emission, the sound energy level) produced by the noise source with frequency A-weighting applied is calculated using those measurements.

ANSI/ASA S12.56-2011 history

• 2011 ANSI/ASA S12.56-2011 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