ANSI/ASA S12.54/ISO 3744 : 2011(R2016)

1 Scope
2 Normative references
3 Terms and definitions
4 Test environment
5 Instrumentation
6 Definition, location, installation, and
   operation of noise source under test
7 Reference box and measurement surface
8 Determination of sound power levels and
   sound energy levels
9 Measurement uncertainty
10 Information to be recorded
11 Test report
Annex A (normative) - Qualification procedures for
        the acoustic environment
Annex B (normative) - Microphone arrays on a
        hemispherical measurement surface
Annex C (normative) - Microphone arrays on a
        parallelepiped measurement surface
Annex D (informative) - Microphone arrays on a
        cylindrical measurement surface
Annex E (normative) - Calculation of A-weighted
        sound power levels and A-weighted sound
        energy levels from frequency band levels
Annex F (normative) - Alternative microphone
        array on a hemispherical measurement surface
        for direct measurements of A-weighted
        sound pressure levels
Annex G (normative) - Sound power level and
        sound energy level under reference
        meteorological conditions
Annex H (informative) - Guidelines on the development
        of information on measurement
        uncertainty
Bibliography

This American 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 the noise source (machinery or equipment) in an environment that approximates to an acoustic free field near one or more reflecting planes.