, i. lo9e -r, = Ati, h = i hgi^ Ati = i log~^ (1.59 X 8.69) = 1,000,000 i. With this value of the initial intensity it is possible to calculatethe intensity i of the residual sound at any instant during the decay,by the formula ^^^ j^ _ ;„^^ • ^ ^^^ and the result when plotted is shown in Figure… … 3 10 » U 13 ti U 4 5 6 7 8 9 Time in seconds Fig. 19. Decay of sound in the lecture-room of the Boston PubUcLibrary beginning immediately after the cessation of one organpipe. periments described above, with others, were in anticipation ofchanges designed to remedy the difficulty. Hair felt, in…
Architectural acoustics
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