Microphone device and portable recorder comprising same
US8315397B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 4, 2009 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Feb 12, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/406
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A first microphone device according to the present invention comprises a pair of directional microphones with high directivity in a sound collecting direction, a pair of nondirectional microphones with low directivity in the sound collecting direction, and a casing accommodating the pair of directional microphones and the pair of nondirectional microphones. The pair of nondirectional microphones is arranged so that sound collecting directions thereof are outward from both side surface walls of the casing, while the pair of directional microphones is arranged so that sound collecting directions thereof are outward from a front surface wall of the casing and intersect each other in vicinity of the front surface wall. All or a part of the pair of directional microphones is accommodated in a space sandwiched by the pair of nondirectional microphones.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.