Patent ID: 11956581
Assignee: COCHLEAR LIMITED
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  A | IPC A  H

Claim 0:
1. A microphone unit configured to be implanted in a recipient, comprising:
an implantable hermetically-sealed housing;
a first chamber disposed in the implantable hermetically-sealed housing and comprising a first end and a second end;
a second chamber disposed in the implantable hermetically-sealed housing and comprising a first end and a second end, wherein the first end of the second chamber is adjacent the second end of the first chamber;
a first flexible membrane disposed across the first end of the first chamber;
a microphone element disposed between the second end of the first chamber and the first end of the second chamber;
a coupling member in communication with the first chamber and configured to generate an input signal based on vibration of a vibrating structure of the recipient, wherein the coupling member is disposed external to the implantable hermetically-sealed housing; and
a pressurized fluid filling the first chamber and maintaining a first chamber pressure therein that is greater or less than an ambient pressure.