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  • BSI
    BS EN ISO 9614-3:2009 Acoustics. Determination of sound power levels of noise sources using sound intensity - Precision method for measurement by scanning
    Edition: 2010
    $473.45
    / user per year

Description of BS EN ISO 9614-3:2009 2010

1.1 This part of ISO 9614 specifies a method for measuring the component of sound intensity normal to a measurement surface which is chosen so as to enclose the sound source(s) of which the sound power level is to be determined.

Surface integration of the intensity component normal to the measurement surface is approximated by subdividing the measurement surface into contiguous partial surfaces, and scanning the intensity probe over each partial surface along a continuous path which covers the extent of the partial surface. The measurement instrument determines the averaged normal intensity component and averaged squared sound pressure over the duration of each scan. The scanning operation can be performed either manually or by means of a mechanical system.

The octave band or band-limited weighted sound power level is calculated from the measured one-third-octaveband values. The method is applicable to any source for which a physically stationary measurement surface can be defined, and on which the sound generated by the source under test and by other significant extraneous sources are stationary in time. The source is defined by the choice of measurement surface. The method is applicable in specific test environments fulfilling all relevant requirements of this part of ISO 9614.

This part of ISO 9614 specifies certain ancillary procedures, described in annex C, to be followed in conjunction with the sound power determination. The results are used to indicate the quality of the determination, and hence the grade of accuracy. If the quality of the determination does not meet the requirements of this part of ISO 9614, the test procedure shall be modified in the manner indicated.

This part of ISO 9614 is not applicable to any frequency band in which the sound power of the source is found to be negative on measurement.



Standard NumberBS EN ISO 9614-3:2009
TitleAcoustics. Determination of sound power levels of noise sources using sound intensity - Precision method for measurement by scanning
StatusUnder Review
Publication Date2010-04-30
ReplacesBS EN ISO 9614-3:2002
Identical National Standard OfEN ISO 9614-3:2009, ISO 9614-3:2002
DescriptorsAcoustics, Noise control (acoustic), Acoustic testing, Sound intensity, Precision, Sound sources, Acoustic measurement, Sound generators, Scanners, Acoustic equipment
ICS17.140.01 Acoustic measurements and noise abatement in general
CommitteeEH/1/4
ISBN978 0 580 67419 8
PublisherBSI
Pages48

About BSI

BSI Group, also known as the British Standards Institution is the national standards body of the United Kingdom. BSI produces technical standards on a wide range of products and services and also supplies certification and standards-related services to businesses.
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