Optical microphone for implantable hearing instrument
US9155660B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 17, 2012 |
| Grant date | Oct 13, 2015 |
| Priority date | — |
| Expiry date | Oct 3, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2225/67
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
An implanted microphone is provided that allows for isolating an acoustic response of the microphone from vibration induced acceleration responses of the microphone. The present invention measures the relative motion between a microphone diaphragm, which is responsive to pressure variations in overlying media caused by acoustic forces and acceleration forces, and a cancellation element that is compliantly mounted within a housing of the microphone, which moves primarily in response to acceleration forces. When the microphone and cancellation element move substantially in unison to acceleration forces, relative movement between these elements corresponds to the acoustic response of the microphone diaphragm. This relative movement may be directly measured using various optical measuring systems.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.