• There are no items in your cart
We noticed you’re not on the correct regional site. Switch to our AMERICAS site for the best experience.
Dismiss alert

ANSI S12.51:2012

Superseded
Superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.

View Superseded by
superseded

A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.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 REVERBERATION TEST ROOMS
Available format(s)

Hardcopy , PDF

Superseded date

09-05-2023

Language(s)

English

Published date

01-01-2017

1 Scope
2 Normative references
3 Terms and definitions
4 Reference meteorological conditions
5 Reverberation test room
6 Instrumentation and measurement equipment
7 Definition, location, installation, and operation
   of noise source under test
8 Measurements in the reverberation test room
9 Determination of sound power levels and sound
   energy levels
10 Measurement uncertainty
11 Information to be recorded
12 Test report
Annex A (informative) - Guidelines for the design
        of reverberation test rooms
Annex B (informative) - Guidelines for the design
        of rotating diffusing vanes
Annex C (normative) - Reverberation test room
        qualification procedure for the measurement
        of broad-band sound
Annex D (normative) - Reverberation test room
        qualification procedure for the measurement
        of discrete-frequency components
Annex E (informative) - Extension of frequency
        range to frequencies below 100 Hz
Annex F (normative) - Calculation of octave band
        sound power levels and sound energy levels,
        A-weighted sound power levels and
        A-weighted sound energy levels from
        one-third-octave band levels
Annex G (informative) - Guidelines on the
        development of information on measurement
        uncertainty
Bibliography

Defines methods for determining the sound power level or sound energy level of a noise source from sound pressure levels measured in a reverberation test room.

Committee
S12
DevelopmentNote
Also numbered as ISO 3741. (09/2003) Supersedes ANSI S12.31 and ANSI S12.32 (02/2006)
DocumentType
Standard
Pages
84
ProductNote
Reconfirmed 2012
PublisherName
Acoustical Society of America
Status
Superseded
SupersededBy
Supersedes

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 354:2003 Acoustics — Measurement of sound absorption in a reverberation room
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 3382-2:2008 Acoustics Measurement of room acoustic parameters Part 2: Reverberation time in ordinary 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 9296:2017 Acoustics — Declared noise emission values of information technology and telecommunications equipment
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 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 9295:2015 Acoustics Determination of high-frequency sound power levels emitted by machinery and equipment
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 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 3745:2012 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
IEC 61260:1995 Electroacoustics - Octave-band and fractional-octave-band filters
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

View more information

Access your standards online with a subscription

Features

  • Simple online access to standards, technical information and regulations.

  • Critical updates of standards and customisable alerts and notifications.

  • Multi-user online standards collection: secure, flexible and cost effective.