Microphone
US9609429B2 · kind B2 · utility
5Cited by
13References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 22, 2011 |
| Grant date | Mar 28, 2017 |
| Priority date | — |
| Expiry date | Feb 4, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R19/04
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone comprises a sound inlet, a first MEMS microphone structure comprising a first membrane and associated backplate in the path of the sound inlet and a second MEMS microphone structure comprising a second membrane and associated backplate stacked with respect to the first microphone membrane, with an enclosed space between the first and second membranes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.