ANSI/ASA S12.57 : 2011(R2016)

1 Scope
2 Normative references
3 Terms and definitions
4 Test environment
5 Instrumentation and measurement equipment
6 Location, installation and operation of noise
   source under test
7 Measurement procedure
8 Calculation of sound power levels and sound
   energy levels
9 Measurement uncertainty
10 Information to be recorded
11 Test report
Annex A (normative) - Evaluation of the excess of sound
        pressure level at a given distance
Annex B (informative) - Recommendations for the location
        of the reference sound source and the
        microphones, if only one position is used for
        the reference sound source
Annex C (normative) - Sound power level and sound energy
        level under reference meteorological
        conditions
Annex D (normative) - Calculation of A-weighted sound power
        levels and A-weighted sound energy
        levels from octave-band levels
Annex E (informative) - Guidance on the development of
        information on measurement uncertainty
Bibliography

This American National Standard specifies a method for determining the sound power level or sound energy level of a noise source by comparing measured sound pressure levels emitted by a noise source (machinery or equipment) mounted in situ in a reverberant environment, with those from a calibrated reference sound source.