





30 







10.0 



5.0 4.5 (s) 







35 



- 



1 





1 

 1 



1 1 



■" 





30 



- 









Pressure Spectrum 



Surface Spectrum 



- 





25 



- 











- 



5^ 

















0) 



C 

 UJ 



20 



~ 













o 

 CL 



15 

 10 



- 







/ \ 





- 





5 

 n 



- 





/ 

 / 



/ 



J 



M 



v\ 





- 



0.10 0.20 0.30 



Frequency ( Hz ) 



Figure 7. Summarized pressure and surface spectra. 



0.40 



