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Comments on Bone Conduction Cell Phone
Who would think of a bone conduction phone. Besides Pantech - RAH, that's who. (Read the complete story)

"It would be great if somebody did a little research and gave credit where it's due. This technology is not new, nor unique. A device to transmit sound through the bones in the skull was invented almost 50 years ago by Dr. G Patrick Flanagan. http://www.neurophone.com/"
(Jonathan 10/22/2007 5:07:33 PM)
"Jonathan - I assumed that everyone knew that hearing by bone conduction is a relatively old idea. Bone conduction of sound was first described in the fourteenth century. Physicians in the mid-nineteenth century tested for degrees of deafness by holding a tuning fork to the mastoid process (the bump right behind and below your ear).

The unique thing that Heinlein did (as far as I know) was devise a wireless telephone (a cell phone) that provided no sound output, just vibration against bone.

However, I don't know for sure if somebody designed or patented something similar before 1951. (Probably with a standard hardwired phone.) The first bone conduction hearing aids date from the 1930's, I think.

BTW, Flanagan didn't apply for a patent until 1958, if I'm doing my math correctly, which is 7 years after Heinlein published his book."
(Bill Christensen 10/22/2007 5:32:25 PM)

"In late 1993 or early 1994 I saw a device in use that worked in the opposite sense - it had an ear piece with a built-in microphone that picked up the user's speech through the bones of the skull. It was attached to a walkie-talkie in use by the mate of a mega-yacht who was guiding his skipper into a berth. I was fascinated by the device and asked him about it. He said it was great for working at sea because it reduced the wind noise from a normal microphone, and also left both hands free (it had a voice-activated transmitter). I've never seen anything like it since. "
(SimonTeW 11/4/2007 2:52:45 AM)
"I wonder if this technology could be used to help deaf people?"
(Amy 1/15/2010 6:56:42 PM)
"Hack again?!"
(Zaebinas 4/8/2011 1:13:04 AM)
"i would like to surgically implant one in you. The wires could be tunnelled subcutaneously to the receiver which could be worn on a belt and changed every two years with your new contract."
( 5/31/2011 7:14:23 PM)

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