Sorry I do not have any idea for you.
Sounds like FBI project I like it. Let me know if
You came up with any solution. I am sure even you
Make some thing that works after 5 years they will
Report that your device thru the teeth cases cancer
Or some thing else.

Andre.

-----Original Message-----

I have an applicaton where I would like to be able to talk to somebody
(remotely via radio). However I would like nobody around them to hear
what
is being said. Also it should not be noticable that they have any sort
of
hearing device on(e.g headphones).

I thought about using bone transmission of sound. You could give them a
little ball with a speaker inside it and when they want to hear they
bite
the ball and the sound travells through the teeth into the ears.

Anybody know anything about this or have any other ideas??

Cheers.





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