Standard Swedish standard · SS-EN ISO 9614-3:2009

Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 3: Precision method for measurement by scanning (ISO 9614-3:2002)

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Standard Swedish standard · SS-EN ISO 9614-3:2009

Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 3: Precision method for measurement by scanning (ISO 9614-3:2002)
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Scope
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-octave- band 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.

Subjects

Acoustics (14.020) General (17.140.01)


Buy this standard

Standard Swedish standard · SS-EN ISO 9614-3:2009

Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 3: Precision method for measurement by scanning (ISO 9614-3:2002)
Subscribe on standards - Read more Dölj
Price: 1 320 SEK
standard ikon pdf

PDF

Price: 1 320 SEK
standard ikon

Paper

Price: 2 112 SEK
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Product information

Language: English

Written by: Svenska institutet för standarder

International title:

Article no: STD-70463

Edition: 2

Approved: 8/17/2009

No of pages: 52

Replaces: SS-EN ISO 9614-3 , SS-EN ISO 9614-3