-=> Jasen Betts said to Greg Mayman
 -=> about "VEHICLE LED'S" on 10-25-03  20:01.....

 JB> works for scaring birds

I wasn't thinking of just scaring them... maybe scarring 

 JB> dunno if low frequency sound waves can be focussed as easily as the
 JB> higher frequencies....

Yep, just as easily, at least in theory.

But most tightly focussed arrays are multiples of a wavelength
wide, and wavelength at 100 Hz is about 11 ft.

Makes the unit kinda large to sneak up with.

From Greg Mayman, in beautiful Adelaide, South Australia
   "Queen City of The South"    34:55 S  138:36 E

... That must be wonderful!  I don't understand it at all.
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