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ANSI S12.55 : 2012

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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
Amended by

ANSI/ASA S12.55:2012/AMD 1:2021

Available format(s)

Hardcopy , PDF

Superseded date

13-07-2019

Language(s)

English

Published date

01-01-2012

Publisher

Acoustical Society of America

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

Defines methods for measuring the sound pressure levels on a measurement surface enveloping a noise source (machinery or equipment) in an anechoic room or a hemi-anechoic room.

Committee
S12
DevelopmentNote
Supersedes ANSI S12.35 (07/2006) Also numbered as ISO 3745. (11/2012) NEW CHILD AMD 1 2021 IS NOW ADDED
DocumentType
Revision
Pages
104
ProductNote
NEW CHILD AMD 1 2021 IS NOW ADDED
PublisherName
Acoustical Society of America
Status
Superseded
SupersededBy
Supersedes

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ISO 7574-2:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 2: Methods for stated values for individual machines
ISO 4871:1996 Acoustics — Declaration and verification of noise emission values of machinery and equipment
IEC 61183:1994 Electroacoustics - Random-incidence and diffuse-field calibration of sound level meters
ISO 12001:1996 Acoustics Noise emitted by machinery and equipment Rules for the drafting and presentation of a noise test code
ISO 3744:2010 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
ISO 3743-2:1994 Acoustics Determination of sound power levels of noise sources using sound pressure Engineering methods for small, movable sources in reverberant fields Part 2: Methods for special reverberation test rooms
ISO 7574-4:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 4: Methods for stated values for batches of machines
ISO/TR 25417:2007 Acoustics Definitions of basic quantities and terms
ISO 9614-1:1993 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 1: Measurement at discrete points
IEC 60942:2003 Electroacoustics - Sound calibrators
ISO 26101:2017 Acoustics Test methods for the qualification of free-field environments
ISO 3747:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering/survey methods for use in situ in a reverberant environment
ISO 3740:2000 Acoustics Determination of sound power levels of noise sources Guidelines for the use of basic standards
ISO 140-3:1995 Acoustics — Measurement of sound insulation in buildings and of building elements — Part 3: Laboratory measurements of airborne sound insulation of building elements
ISO 9613-1:1993 Acoustics Attenuation of sound during propagation outdoors Part 1: Calculation of the absorption of sound by the atmosphere
ISO 9614-2:1996 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 2: Measurement by scanning
ISO 7574-1:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 1: General considerations and definitions
ISO 80000-8:2007 Quantities and units Part 8: Acoustics
ISO 3746:2010 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
ISO 11690-1:1996 Acoustics Recommended practice for the design of low-noise workplaces containing machinery Part 1: Noise control strategies
ISO 6926:2016 Acoustics Requirements for the performance and calibration of reference sound sources used for the determination of sound power levels
ISO 9614-3:2002 Acoustics — Determination of sound power levels of noise sources using sound intensity — Part 3: Precision method for measurement by scanning
ISO 7574-3:1985 Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 3: Simple (transition) method for stated values for batches of machines
ISO 3741:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Precision methods for reverberation test rooms
IEC 61260:1995 Electroacoustics - Octave-band and fractional-octave-band filters
ISO 11201:2010 Acoustics Noise emitted by machinery and equipment Determination of emission sound pressure levels at a work station and at other specified positions in an essentially free field over a reflecting plane with negligible environmental corrections
ISO/IEC Guide 98-3:2008 Uncertainty of measurement — Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
ISO 3743-1:2010 Acoustics Determination of sound power levels and sound energy levels of noise sources using sound pressure Engineering methods for small movable sources in reverberant fields Part 1: Comparison method for a hard-walled test room

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