| 摘要 |
<p>An implantable hearing aid microphone comprises a housing (20) having an internal chamber (30) with an aperture (42) thereto and a first diaphragm (52) sealably positioned across the aperture. A microphone (60) having a second diaphragm (54) is positioned within the chamber to define an enclosed volume between the first and second diaphragms. A peripheral rim defines the aperture of the housing, wherein the first diaphragm may be recessed between about .5mm and 1.0mm relative to the peripheral rim across the lateral extent of the first diaphragm. The internal chamber may be defined to include a first portion (32) having a first cross-sectional area adjacent to the second diaphragm that is smaller than the first cross-sectional area adjacent to the second diaphragm that is smaller than the first cross-sectional area. The second portion (34) is disposed to extend away from the first portion about an axis that is transverse to the first diaphragm.</p> |
