Page 261 - Master Handbook of Acoustics
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FIGURE 12-15 The sound absorption of velour hung straight for three different weights of fabric.
(Beranek.)
The higher the degree of folding, the greater the absorption. This is mainly because folds increase
the amount of surface area presented to sound. The effect is shown in Fig. 12-16. The “draped to 7/8
area” means that the entire 8/8 area is drawn in only slightly (1/8) from the flat condition. As can be
seen, the deeper the drape fold, the greater the absorption.
FIGURE 12-16 The effect of draping on the sound absorption of drapes. “Draped to 1/2 area” means
