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Norm
ÖNORM EN ISO 3743-2
Issue date: 1997 02 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering methods for small, movable sources in reverberant fields - Part ...(abbreviated)
1.1 General
This patt of ISO 3743 specifies a relatively simple engineering
method for determining the Sound power
levels of small, movable noise sources. The
measure...
Withdrawn: 2009 12 01
§ Legal References
Publisher:
Austrian Standards International
Format:
Digital | 31 Pages
Language:
German
| English
Currently valid:
Optionally co-design standards:
ICS
1.1 General
This patt of ISO 3743 specifies a relatively simple engineering
method for determining the Sound power
levels of small, movable noise sources. The
measurements are carried out when the Source is installed
in a specially designed room having a specified
reverberation time over the frequency range of
interest. The A-weighted Sound power level of the
Source under test is determined from a Single Aweighted
Sound pressure level measurement at each
microphone Position, rather than from a summation
of octave-band Ievels. This direct method eliminates
the need for a reference Sound Source, but requires
the use of a special reverberation test room. The direct
method is based on the premise that the Sound
pressure level, averaged in space and time in the test
room, tan be used to determine the Sound power
level emitted by the Source. The properties of the
special reverberation test room are Chosen so that the
room¿s influence on the Sound power output of the
equipment under test is small. The number of microphone
positions and Source locations required in the
test room are specified. Guidelines for the design of
special reverberation rooms are given in annex B.
On addition to the direct method, a comparison
method is also described (see 8.3). However, since
the requirements on the test room for the comparison
method of ISO 3743-1 are considerably less restrictive,
it is recommended that the comparison method
of ISO 3743-1 be used if a special reverberation test
room is not available.
NOTE 1 Precision methods for the determination of the
Sound power levels of small noise sources are specified in
ISO 3741 and ISO 3745.
1.2 Types of noise
The methods specified in this part of ISO 3743 are
suitable for measurements of all types of noise within
a specified frequency range, except impulsive noise
consisting of isolated bursts of Sound energy.
NOTES
2 A classification of different t (...abbreviated)
ÖNORM EN ISO 3743-2
2020 03 15
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering ...
Norm
ÖNORM EN ISO 3743-2
2009 12 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering ...
Norm
ÖNORM EN ISO 3743-2
1997 02 01
Acoustics - Determination of sound power levels of noise sources using sound pressure - Engineering ...
Norm
↖
ÖNORM S 5033
1978 12 01
Determination of sound power levels of noise sources; engineering methods for special reverberation ...
Norm
Norm
Issue date :
1990 04 01
Acoustics; statistical methods for determining and verifying stated noise emission values of machinery and equipment; general considerations and definitions
Norm
Issue date :
1990 04 01
Acoustics; statistical methods for determining and verifying stated noise emission values of machinery and equipment; methods for stated values for batches of machines
Norm
Issue date :
1988 12 15
Acoustics — Determination of sound power levels of noise sources — Precision methods for broad-band sources in reverberation rooms
Norm
Issue date :
1994 02 17
Acoustics — Determination of sound power levels of noise sources — Engineering methods for small, movable sources in reverberant fields — Part 1: Comparison method for hard-walled test rooms
Norm
Issue date :
1977 05 01
Acoustics — Determination of sound power levels of noise sources — Precision methods for anechoic and semi-anechoic rooms
Norm
Issue date :
1990 10 11
Acoustics — Determination of sound power levels of noise sources — Requirements for the performance and calibration of reference sound sources
Norm
Issue date :
1985 12 19
Acoustics — Statistical methods for determining and verifying stated noise emission values of machinery and equipment — Part 1: General considerations and definitions
Norm
Issue date :
2009 12 01
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 3743-2:1994)
Norm
Issue date :
1994 11 03
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