99.99 



99.9 



99 



95 



90 



Q 



70 



*l 





< 



60 







oc 



Sll 



< 





> 



40 



1— 

 < 



30 



1 





—> 





? 



XI) 



-D 





O 









M 



1U 



1 





< 



5 



> 



Of 





O 





^ 



2 





1 



0.1 



0.01 



SHIP NOISE 



-3-2-10123 

 AMPLITUDE IN STANDARD DEVIATION UNITS 



Figure 12. Cumulative probability of 

 noise samples shown in figure 4. 



29 



