Patent Number: 2995633
Patent Date: Sept. 25, 1958
Added to IOP: May 16, 2024, 2:43 p.m.
The patent describes a method of using bone conduction (vibrating the skull instead of the air) in order to assist people with bad hearing. It could be used as a silent speaker. The examples suggest that a tooth is implanted with a device which then acts as a speaker.
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