DIN EN ISO 9614-1:2009
Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points (ISO 9614-1:1993); English version of DIN EN ISO 9614-1:2009-11

Standard No.

DIN EN ISO 9614-1:2009

Release Date

2009

Published By

German Institute for Standardization

Status

Be replaced

Replace By

DIN EN ISO 9614-1:2009-11

Latest

DIN EN ISO 9614-1:2009-11

Replace

DIN EN ISO 9614-1:1995 DIN EN ISO 9614-1/A1:2009

Scope

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 noise source(s} of which the sound power level is to be determined. The one-octave, one-third- octave or band-limited weighted sound power level is calculated from the measured values. The method is applicable to any source for which a physically sta- tionary measurement surface can be defined, and on which the noise generated by the source is stationary in time (as defined in 3.13). The source is defined by the choice of measurement surface. The method is applicable in situ, or in special purpose test environ- ments, 1.2 This part of ISO 9614 is applicable to sources situated in any environment which is neither so vari- able in time as to reduce the accuracy of the meas- urement of sound intensity to an unacceptable degree, nor subjects the intensity measurement probe to gas flows of unacceptable speed or un- steadiness (see 5.3 and 5.4). In some cases, it will be found that the test conditions are too adverse to allow the requirements of this part of ISO 9614 to be met. In particular, extraneous noise levels may vary to an excessive degree during the test. In such cases, the method given in this part of ISO 9614 is not suitable for the determination of the sound power level of the source. NOTE 1 Other methods, e.g. determination of sound power levels from surface vibration levels as described in ISO/TR 7849, may be more suitable. 1.3 This part of ISO 9614 specifies certain ancillary procedures, described in annex B, to be followed in conjunction with the sound power determination. The results are used to indicate the quality of the deter- mination, and hence the grade of accuracy. If the in- dicated quality of the determination does not meet the requirements of this part of ISO 9614, the test procedure should be modified in the manner indi- cated.

DIN EN ISO 9614-1:2009 Referenced Document

• IEC 60942:1988 Sound calibrators
• IEC 61043 Electroacoustics; instruments for the measurement of sound intensity; measurement with pairs of pressure sensing microphones
• ISO 5725:1986 Precision of test methods; Determination of repeatability and reproducibility for a standard test method by inter-laboratory tests

DIN EN ISO 9614-1:2009 history

• 2009 DIN EN ISO 9614-1:2009-11 Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points (ISO 9614-1:1993); German version EN ISO 9614-1:2009
• 2009 DIN EN ISO 9614-1:2009 Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points (ISO 9614-1:1993); English version of DIN EN ISO 9614-1:2009-11
• 1970 DIN EN ISO 9614-1:1995 Acoustics - Determination of sound power levels of noise sources using sound intensity - Part 1: Measurement at discrete points