particularly necessary for the large pipesand the low tones; a very much less separation would have servedthe purpose in the case of the high tones. 84 ARCHITECTURAL ACOUSTICS From the point where the four tubes leading to the small organsmeet, a supply pipe ran, as shown on the drawing, to an air… … Fig. 1 heretofore recorded, were carried out at night between twelve andfive oclock. The rate of emission of sound by the several pipes having beendetermined, the next work was the determination of the coefficientsof absorption. The methods employed having already been suflB-ciently described, only…
Architectural acoustics
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