Differential condenser microphone with double vibrating membranes
US11553282B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2020 |
| Grant date | Jan 10, 2023 |
| Priority date | — |
| Expiry date | Apr 4, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2209/026
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A dual-diaphragm differential capacitive microphone includes: a back plate, a first diaphragm, and a second diaphragm. The first diaphragm is insulatively supported on a first surface of the back plate, where the back plate and the first diaphragm form a first variable capacitor. The second diaphragm is insulatively supported on a second surface of the back plate, where the back plate and the second diaphragm form a second variable capacitor. The back plate is provided with at least one connecting hole. The second diaphragm is provided with a recess portion recessed towards the back plate, where the recess portion passes through the connecting hole and is connected to the first diaphragm. The dual-diaphragm differential capacitive microphone achieves a higher signal-to-noise ratio.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.