ordi-narily used in churches. It is to be observed that all four curvesfall off for the higher frequencies, all show a maximum locatedwithin an octave, and three of the curves show a curious hump inthe second octave. This break in the curve is a genuine phenomenon,as it was tested time after time.… … Fig. 7. The absorbing power of cushions. Curve 1 isf°r Sanders Theatre cushions of wiry vegetablefiber, covered with canvas ticking and a thin cloth.Curve 2 is for Brooks House cushions of long tair,covered with the same kind of ticking and plush.Curve 3 is for Appleton Chapel cushions of…
Architectural acoustics
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