and repeat tests were run in an effort to obtain sufficient data to perform a 

 statistical analysis. Therefore, 100 waves of each condition were run and the 

 corresponding pressures were recorded. These tests were performed in the same 

 manner as described earlier; however, since the number of transducers used 

 was reduced from 12 to 8, the sampling rate was increased to approximately 

 280 samples/sec. 



14 



