This invention relates to an implantable microphone device. The implantable microphone device typically comprises a housing defining an internal chamber. It typically further comprises a microphone arrangement on the housing, the microphone arrangement having a first cavity, a second cavity, and a membrane...http://www.google.es/patents/US6422991?utm_source=gb-gplus-sharePatente US6422991 - Implantable microphone having improved sensitivity and frequency response
Implantable microphone having improved sensitivity and frequency response
