Variation of reverberation time with quantity of absorbers in an unfurnished room

An experimental investigation of reverberation of sound at frequencies of 500 and 1000Hz in a room of 35.27m3 has been carried out using B & K Type acoustic instruments. Varied amount of Celotex ceiling board was used as the sound absorber. The result showed that the reverberation time falls progressively with increasing number of the absorbers. This result was found consistent with those of other investigations measured under standardconditions. In this investigation, it was found that in small-sized rooms typical of those used for office accommodation, broadcasting and recording studios, reverberation time can be simply controlled to achieve desired results