Table !„=■- Sound field intensity produced by "V.'arapus" at 100 



pounds air pressure and 6o pounds of water pressure. 



Microvoltl/ 



300 

 110 

 56 

 28 

 23 

 10 



7 



5.6 

 I4.5 

 I4- 



1/ A convenient way to express the output of a hydrophone in terms of 

 the acoustic input is by stating the number of microvolts response 

 per dyne per square centimater., Hydrophones are constructed so that 

 the sensitivity thus expressed is independent of the power input and 

 the frequency of the sound o 



33 



