Great idea for a natural hearing aid!
To: NowApproachingMidnight
2 posted on
12/14/2012 7:51:45 PM PST by
cripplecreek
(REMEMBER THE RIVER RAISIN!)
To: NowApproachingMidnight
WWII Chain-Home detection, Great Britain. You would be amazed at what they could pick up and at what distances with great directionality.
/johnny
To: NowApproachingMidnight
To: NowApproachingMidnight
There are a few museums with hearing aid collections...
you might be amused by the vast numbers of prior art.
http://www.youtube.com/watch?v=IrfPyaMBBWM
Uploaded on Feb 15, 2010
This is a short video advertising The Kenneth Berger Hearing Aid Museum and Archives. It is located on Kent State University in Kent, Ohio.
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