6.0 MSEC 



^y,3flHN^ 



1000-3000 CYCLES 



2000-4000 CYCLES 





1000-3000 CYCLES 



"MlfHH» 



2000-3000 CYCLES 



2000-10,000 CYCLES 



2000-10,000 CYCLES 



Figure 21. Waveforms produced by spark source in 

 compliant resonant chamber. 



42 



