BS 4196-4(1981) : 1981被替代
SOUND POWER LEVELS OF NOISE SOURCES - ENGINEERING METHODS FOR DETERMINATION OF SOUND POWER LEVELS FOR SOURCES IN FREE FIELD CONDITIONS OVER A REFLECTING PLANE
出版：British Standards Institution
专家解读视频
Explains engineering methods for measuring the sound pressure levels on a measurement surface enveloping the source and for calculating the sound power level produced by the source. Gives requirements for the test environment and instrumentation as well as techniques for obtaining the surface sound pressure level from which the A-weighted sound power level of the source and octave or one-third octave band sound power levels are calculated. This is concerned with specification of the basic acoustic requirements for the measurement of noise under free-field conditions over a reflecting plane. It is important that specific test codes for various types of equipment be established and used as the basis for measurements.
