ANSI S12.55 : 2012
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS AND SOUND ENERGY LEVELS OF NOISE SOURCES USING SOUND PRESSURE - PRECISION METHODS FOR ANECHOIC ROOMS AND HEMI-ANECHOIC ROOMS
Hardcopy , PDF
13-07-2019
English
01-01-2012
1 Scope
2 Normative references
3 Terms and definitions
4 Reference meteorological conditions
5 Test rooms
6 Instrumentation
7 Definition, location, installation and operation
of noise source under test
8 Measurement surface
9 Determination of sound power levels and sound
energy levels
10 Measurement uncertainty
11 Information to be recorded
12 Test report
Annex A (normative) - General procedures for
qualification of anechoic and hemi-anechoic
rooms
Annex B (normative) - Qualification procedure for
spaces within test rooms used in the
determination sound power levels and
sound energy levels of specific noise
sources
Annex C (normative) - Calculation of A-weighted
sound power levels and A-weighted sound
energy levels from one-third-octave band
levels
Annex D (normative) - Array of microphone positions
on a spherical measurement surface in
a free field
Annex E (normative) - Arrays of microphone positions
on a hemispherical measurement surface in
hemi-free field
Annex F (normative) - Coaxial circular paths of
microphones on a hemispherical measurement
surface a hemi-free field
Annex G (normative) - Meridional paths of microphones
on a hemispherical measurement surface
in hemi-free field
Annex H (normative) - Spiral paths of microphones on
a hemispherical measurement surface
in a hemi-free field
Annex I (informative) - Guidance on the development
of information on measurement uncertainty
Bibliography
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