Q 35 



O 30 



Z 20 



-130 -120 -110 -100 



MEDIAN RF SIGNAL RECEIVED IN DBW 



Fig. 12 — Correlation between median values of speech-to-noise ratio and r-f 

 signal strength in suburban locations. (Note: Each point represents the speech- 

 to-noise ratio and the r-f signal received at one location, (a) 150 mc. (b) 450 mc. 

 (c) 900 mc. 



1083 



