Implantable microphone for use with a hearing aid or cochlear prosthesis
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Feb 4, 2003
Grant Date -
N/A
app pub date -
Feb 7, 2000
filing date -
Feb 7, 2000
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A totally implantable microphone for use with an implanted hearing aid comprises a cylindrical bio-inert housing having a bio-inert metallic membrane at the acoustic sensing end and a bio-inert plate containing electrical lead-throughs at the other end. The cylindrical housing is implanted in the posterior wall of the external auditory canal, with the thin auditory canal skin overlaying the microphone membrane surface. Surface features on the housing ossiointegrate it to the auditory canal bone, and a flange on the housing posterior end prevents post-operative migration into the auditory canal. A support plate beneath the membrane limits inward flexing and increases the signal-to-noise ratio. A protruding rim around the membrane perimeter acts to protect the membrane from rupturing during outward flexure. Lithographically formed wires laminated in a thin inert polymer and connected to the lead-throughs enable the overall length of the encapsulated microphone to be very short.
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