BUCK: ARCTIC ENVIRONMENTAL LP ACOUSTICS MEASUREMENTS, 

 MODELS AND PLANS 



10 



♦1- 



-3- 



(HZ) 



100 



X- — 



-2- 



*■ 100' hgd 



200'hyd 



-6* 



p. 

 -7- 



-8* 



o o 



30'hyd 



S/N, - S/R 



200' 



Figure 20. RELATIVE SIGNAL TO NOISE RATIO 

 VERSUS FREQUENCY 



756 



