Implantable microphone

摘要

An implantable microphone for placement in soft tissue, comprising a sensor arrangement comprising a housing, a first pressure sensor having a first membrane for being exposed to surrounding soft tissue and a second pressure sensor having a second membrane for being exposed to surrounding soft tissue and a compensation circuitry for combining the output signals of the first and second sensor in a manner so as to eliminate signals resulting from acceleration forces acting on the sensor arrangement, wherein the first and the second sensor are of a mirror-symmetric design with regard to each other, with the first and the second membrane being arranged parallel to each other.

主权项

1. A fully implantable hearing instrument comprising:
an implantable microphone for placement in soft tissue, comprising:
a sensor arrangement comprising:
a housing;a first pressure sensor having a first membrane configured to be exposed to surrounding soft tissue and configured to output a first output signal; anda second pressure sensor having a second membrane configured to be exposed to the surrounding soft tissue and configured to output a second output signal; anda compensation circuitry configured to combine the first output signal of the first pressure sensor and the second output signal of the second pressure sensor in relation to a correction factor (C) to obtain an acceleration compensated signal (P) and to eliminate signals resulting from acceleration forces acting on the sensor arrangement, wherein the first and the second pressure sensors are of a mirror-symmetric design with regard to each other, with the first and the second membranes being arranged parallel to each other; and an implantable output transducer configured to stimulate a patient's hearing based on the combined first and second output signals.