LOUD SPEAKERS AND MICROPHONES 



261 



62.5 125 250 500 1000 2000 4000 11,500 



FREQUENCY IN CYCLES PER SECOND 



Fig. 1 — Peak powers delivered by an orchestra within various frequency regions. 



100 500 1000 5000 10,000 20,000 



FREQUENCY IN CYCLES PER SECOND 



r"'S- 2 — Frequency transmission range required to produce no noticeable distortion 

 for orchestral instruments. 



