SABINE. — ARCHITECTURAL ACOUSTICS. 



73 



.13 



.U 



.10 



.09 



.08 



.07 



.06 



.05 



.04 



.03 



.02 



.01 





C, 



Cj C4 



FlGCRE 7. 



The absorbing power of wood sheathing, two centimeters thick, North CaroHna 

 pine. The observations were made under very unsuitable conditions. The ab- 

 sorption is here due almost wholly to yielding of the sheathing as a whole, the 

 surface being shellacked, smooth, and non-porous. The curve shows one point of 

 resonance within the range tested, and the probability of another point of reson- 

 ance above. It is not possible now to learn as much in regard to the framing 

 and arrangement of the studding in the particular room tested as is desirable. 

 C3 (middle C) 256. 



