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mmmaaaxxx
on Jan 8, 2015
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Can't you just turn up the volume?
> 2. I will carry the microphone and amplifier in my shirt pocket. No more feedback.
This is how hearing aids used to be:
http://www.hearingaidmuseum.com/gallery/Transistor%20(Body)/...
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This is how hearing aids used to be:
http://www.hearingaidmuseum.com/gallery/Transistor%20(Body)/...