Systems and methods for sensing an acoustic signal using microelectromechanical systems technology
US6688169B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2001 |
| Grant date | Feb 10, 2004 |
| Priority date | — |
| Expiry date | Jun 15, 2021 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R23/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic system has an acoustic sensor and a processing circuit. The acoustic sensor includes a base, a microphone having a microphone diaphragm supported by the base, and a hot-wire anemometer having a set of hot-wire extending members supported by the base. The set of hot-wire extending members defines a plane which is substantially parallel to the microphone diaphragm. The processing circuit receives a sound and wind pressure signal from the microphone and a wind velocity signal from the hot-wire anemometer, and provides an output signal based on the sound and wind pressure signal from the microphone and the wind velocity signal from the hot-wire anemometer (e.g., accurate sound with wind noise removed). The configuration of the hot-wire extending members defining a plane which is substantially parallel to the microphone diaphragm can be easily implemented in a MEMS device making the configuration suitable for miniaturized applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.