200 N. M. RADIUS 



400 N. M. RADIUS 



■ — 600 N. M. RADIUS 



800 N. M. RADIUS 



0.4 



0.3 



0.2 



0.1 



O 0.0 



-0.1 



-0.2 





































i 



/ 

 // 



f"/ 



\ 



\ 



























I 



/ 

 / 

 / 



\ - 

 \ 

 \ 







/ 



/ 

 / 



i 

 \ 













V- 



r — 







X J 





/ 



if 





"*■■ 



/ 



















1 



\ V 



\ 

 \ 



S 



s 





- / 





































MINIMUM N = 



151 



-0.1 



10 12 16 20 25 32 40 50 63 80 100 126 160 200 250 320 400 

 FREQUENCY, C/S 



Figure 9. Variation with frequency of coefficient of correlation between sound 

 pressure spectrum level and maximum wove heights observed at the indicated 

 radial distances for periods during which wave height at source was less than 3 

 feet, April through December 7964. 



19 



