Unidirectional microphone unit
US9788102B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 4, 2016 |
| Grant date | Oct 10, 2017 |
| Priority date | — |
| Expiry date | Oct 4, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In a unidirectional microphone unit, stable frequency characteristics can be obtained, and manufacturing cost is reduced while preventing increasing of an external size. A microphone cap that covers a microphone element is included, and the microphone cap includes a porous ring member arranged in the front of the microphone element to form a first communication space communicating with a front acoustic hole in a center side, and a cylindrical member supporting a peripheral edge portion of the ring member and surrounding a periphery side of the microphone element, and forming a second communication space communicating with a rear acoustic hole in the periphery side of the microphone element, and the first communication space and the second communication space are communicated through the ring member.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.