Microphone seal
US9380369B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 14, 2013 |
| Grant date | Jun 28, 2016 |
| Priority date | — |
| Expiry date | Apr 27, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A microphone includes elements to protect against overpressure, such as from sudden physical shock. A cavity between ambient atmosphere and the microphone diaphragm includes a movable seal, which blocks overpressure from reaching the diaphragm when closed, and allows ordinary pressure to reach the diaphragm when open. The cavity can also have an entrance from ambient atmosphere offset from an exit to the diaphragm, and can include a valve which vents overpressure, or balloons in response to overpressure, so that overpressure does not directly reach the diaphragm. The seal or valve can be kept open or kept closed, and moved between states in response to whether the microphone should be in use or protected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.