Implantable microphone device
First Claim
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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; and
an 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.
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Abstract
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.
17 Citations
15 Claims
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1. An implantable microphone device, said device comprising:
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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; anda 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; and an 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An implantable hearing prosthesis system including an implantable microphone device, said implantable microphone device comprising:
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a hermetically sealed housing having an internal cavity;
said internal cavity having a microphone assembly arranged to receive sound waves originating from external said housing; anda pressure sensor arrangement, arranged to detect and determine the differential pressure between said internal cavity and an exterior of said housing;
wherein the system includes a processor that is configured to use the determined differential pressure 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 the internal cavity; and an external pressure sensor arranged to detect a pressure external the housing; wherein the system is configured to compare the outputs of the internal and the external pressure sensors to determine the differential pressure. - View Dependent Claims (10, 11, 12, 13, 14)
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15. An implantable hearing prosthesis system including an implantable microphone device, said implantable microphone device comprising:
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a hermetically sealed housing having an internal cavity;
said internal cavity having a microphone assembly arranged to receive sound waves originating from external said housing; anda pressure sensor arrangement, arranged to detect and determine the differential pressure between said internal cavity and an exterior of said housing;
wherein the system includes a processor that is configured to use the determined differential pressure 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 said internal cavity comprises a first and second cavity interconnected by a purge passage;
said microphone assembly being arranged in said first cavity, andwherein said system is configured to compare the outputs of said internal and external pressure sensors to determine said differential pressure; and
wherein said internal pressure sensor is arranged in said first and/or second cavity.
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Specification