EN ISO 9614-1:2009

1 Scope
2 Normative references
3 Definitions
4 General requirements
5 Acoustic environment
6 Instrumentation
7 Installation and operation of the source
8 Measurement of normal sound intensity component levels
9 Calculation of sound power level
10 Information to be reported
Annex A (normative) Calculation of field indicators
Annex B (normative) Procedure for achieving a desired
        grade of accuracy
Annex C (informative) Effects of airflow on measurement
        of sound intensity
Annex D (informative) Effect of sound absorption within
        the measurement surface
Annex E (informative) Bibliography
Annex ZA (informative) Relationship between this European Standard
         and the Essential Requirements of EU Directive 98/37/EC
Annex ZB (informative) Relationship between this European Standard
         and the Essential Requirements of EU Directive 2006/42/EC

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 value. The method is applicable in situ or in special purpose test environments to any source for which a physically stationary measurement surface can be defined, and on which the noise generated by the source is stationary in time.