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From: gs26@prism.gatech.edu (Glenn R. Stone)
Newsgroups: comp.dcom.telecom
Subject: Re: Telecom Peeves
Message-ID: <9788@accuvax.nwu.edu>
Date: 16 Jul 90 17:02:39 GMT
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In <9729@accuvax.nwu.edu> claris!netcom!ergo@ames.arc.nasa.gov (Isaac
Rabinovitch) writes:

>About a year ago, one of those yuppie electrotoy catalogs featured a
>phone with *no* mouthpiece; it gets your voice from jawbone
>vibrations!  DAK sells walkie-talkies built on the same principle.  I
>dimly recall seeing a TV article on the invention of such technology
> -- this was long ago, and it's original use was for helicopter
>intercoms during the Vietnam War.  Never seen it in stores, though,
>and I've no idea whether it actually works.

Heh.  This idea goes back to WWII, when standard Navy issue was a
throat mike... you can see 'em if your local TV station syndicates
"Black Sheep Squadron" (usually late nite). They hadn't come up
with the idea of a noise-cancelling mike yet, and it was/is pretty
hard to soundproof against 2000+hp and a thirteen-foot prop going
near-transonic an armspan or two from your nose (in the case of the
Corsair).

I've never heard one in action, so I don't know how well it worked,
but it seems to have got us thru the war, so there must be something
there.


Glenn R. Stone 
gs26@prism.gatech.edu