Abstract
The theory of light-weight partitions, single and double panel, has been discussed. The results of experiments conducted with indigenous panels and porous damping material have been presented and compared with theoretical predictions. The transmission loss observed experimentally is much higher than what is predicted by ‘mass law’. On the basis of these results a design of sound-proof door is briefly discussed.The desired sound insulation required of a partition depends on the environmental noise levels and the tolerable noise level inside the enclosed space. Results of the survey of the noise levels outside and inside typical studios are presented. The weakest links in the noise reducing surfaces were spotted out and improvements in the transmission loss were carried out in conformity with economics of the problem.
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