TS 2709-1977 ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES — PRECISION METHODS FOR DISCRETE — FREQUENCY AND NARROW - BAND SOURCES IN REVERBERATION ROOMS
1977TS 2709-1977 ACOUSTICS - DETERMINATION OF SOUND POWER LEVELS OF NOISE SOURCES — PRECISION METHODS FOR DISCRETE — FREQUENCY AND NARROW - BAND SOURCES IN REVERBERATION ROOMS