SABINE. — ARCHITECTURAL ACOUSTICS. 



75 



with long curly hair, and covered with canvas ticking, which was in 

 turn covered by a long nap plush. Curve 3 is for the cushions of Ap- 



C: 



C. 



Ce 



Cj C3 C4 



Figure 8. 



The absorbing power of cusliions. Curve 1 is for " Sanders Theatre" cushions 

 of wiry vegetable fibre covered with canvas ticking and a thin cloth. Curve 2 is for 

 "Brooks House" cushions of long hair covered with the same kind of ticking and 

 plush. Curve 3 is for " Appleton Chapel " cushions of hair covered with ticking 

 and a thin leatherette. Curve 4 is for the elastic felt cushions of commerce of 

 elastic cotton covered with ticking and short nap plush. The absorbing power 

 is per square meter of surface. C3 (middle C) 256. 



pleton Chapel, hair covered Anth a leatherette, and showing a sharper 

 maximum and a more rapid diminution in absorption for the higher 



