1 Scope
2 Normative references
3 Terms and definitions
4 Measurement uncertainty
5 Acoustic environment
5.1 General
5.2 Volume and shape of test room
5.3 Requirements for absorption of test room
5.4 Requirements for background noise level
5.5 Requirements for temperature, humidity and pressure
6 Instrumentation
6.1 General
6.2 Calibration
7 Installation and operation of source under test
7.1 General
7.2 Source location
7.3 Source mounting
7.4 Auxiliary equipment
7.5 Operation of source during test
8 Sound pressure measurements and sound power determination
8.1 Initial measurements
8.2 Additional measurements
8.3 Determination of average sound pressure level in the test
room
8.4 Determination of the sound power level of the sound source
8.5 Determination of A-weighted sound power level of the source
9 Information to be recorded
9.1 Noise sources under test
9.2 Acoustical environment
9.3 Instrumentation
9.4 Acoustical data
10 Information to be reported
Annex A (normative) Room qualification procedure for the
measurement of discrete-frequency components
Annex B (informative) Guidelines for the design of rotating
diffusing vanes
Annex C (informative) Extension for frequencies below 100 Hz
Annex D (informative) Guidelines for the design of
reverberation rooms
Annex E (normative) Test room qualification procedure for the
measurement of broad-band sound
Annex F (normative) Procedure for calculating octave band sound
power levels and an A-weighted sound power level from
one-third-octave band sound power levels
Bibliography
Annex ZA (normative) Normative references to international
publications with their relevant European
publications