Microphone
US8983105B2 · kind B2 · utility
10Cited by
6References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Apr 5, 2011 |
| Grant date | Mar 17, 2015 |
| Priority date | — |
| Expiry date | Apr 5, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R31/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone is disclosed in which a housing is formed by a cap (13) sealed to a substrate (11). A MEMS die (10) is mounted on the substrate (11), the MEMS die (10) incorporating a membrane (12). The membrane (12) has a first surface facing the substrate and in fluid communication with an acoustic inlet port (14) in the cap (13) via an acoustic path (17) and a second surface facing the inner surface of the cap, which second surface along with part of the inner surface of the cap (13) defines at least part of a sealed chamber (19) within which a volume of air is trapped.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.