EFFECT OF NONLINEAR DISTORTION 



329 



AVERAGE AVERAGE AVERAGE 



TOTAL DISTANCE TOTAL DISTANCE TOTAL DISTANCE 



PRESSURE PRESSURE PRESSURE 



,4.6 75 PIECE ORCHESTRA 15FT,„ 7.9 15 PIECE ORCHESTRA lOFT. „ 2.6 PIANO lOFT. 



-20 



£-60 

 O-IOO 



UJ 



tr-Mo 



in , 



■20 



TRUMPET 3FT. .,„ 3.5 CLARINET 3.5FT. ,„ 18.0 CYMBALS 3FT. 



-60 



O 



<-IOO 



u 



> 



<-|40 



O-20 



O -60 

 < 



te-iOO 

 -140 



20 100 1000 10000 20 100 1000 10000 20 100 



FREQUENCY IN CYCLES PER SECOND 



1000 10000 



Fig. 13.10. Ratio of the average pressure per cycle to the average total pressure of the 

 entire spectrum for speech, various musical instruments, and orchestras. The distance and 

 average total pressure are shown above each graph. (After Sivian, Dunn and White.) 



