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ANSI S12.54:2011
Superseded
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ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS AND SOUND ENERGY LEVELS OF NOISE SOURCES USING SOUND PRESSURE - ENGINEERING METHODS FOR AN ESSENTIALLY FREE FIELD OVER A REFLECTING PLANE
Hardcopy , PDF
13-07-2019
English
01-01-2016
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
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