Implantable microphone device

摘要

An implantable microphone device is provided. The device comprises a hermetically sealed housing (3) having an internal cavity (2). The internal cavity (2) has a microphone assembly arranged to receive sound waves originating from external the housing (3). The device further comprises a pressure sensor arrangement, arranged to detect and determine the differential pressure between the internal cavity (2) and the exterior of the housing (3). The determined differential pressure is used to determine a suitable transfer function to be applied to the output of the microphone assembly to produce a signal representative of the received sound waves.

主权项

1. An implantable microphone device, said device comprising:
a hermetically sealed housing having an internal cavity; said internal cavity having a microphone assembly arranged to receive sound waves originating external from said housing; and a pressure sensor arrangement, arranged to detect and determine a differential pressure between said internal cavity and an exterior of said housing; wherein the determined differential pressure is used by a processor coupled to the device to determine a suitable transfer function to be applied to an output of said microphone assembly to produce a signal representative of said received sound waves, wherein the pressure sensor arrangement comprises:
an internal pressure sensor, arranged to detect a pressure within said internal cavity; andan external pressure sensor arranged to detect a pressure external said housing;wherein the outputs of the internal and the external pressure sensors are to be compared to determine the differential pressure.