Re: Woody Norris HyperSonic Sound speaker article

[Dan Dugan <>]

I heard Bernie's demonstrations at the NSS workshop last summer, and 
demonstrations at the NSCA show in Dallas last week. They used a 
recording of water trickling, and the sound would seem to come from 
any object the panel was pointed at. Really neat.

Detractors say the ultrasonic level is around 150 dB and gives people 
headaches. What the effect of the ultrasonic sound would be on 
wildlife is unknown.

-Dan Dugan


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