Fresnel aspherical acoustic mirrors
On Thu, 25 Oct 2012 18:34:35 +0100, "Jim Hawkins"
wrote:
Bone conduction (BTE) devices are, in my opinion, already more effective
than the ITE devices - and are improving. But they too are fragile high-tech
electronic devices, and don't come cheap.
I'm reminded of the BoneFone, as advertised in Omni magazine in the
late 70s. The wearer draped it around their shoulders and it
transmitted the sound to the ears via the collar bone, neck and skull.
Crackpot idea, but sold well enough until people realised they looked
like ****s.
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