Electroacoustic transducer
US9247338B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2011 |
| Grant date | Jan 26, 2016 |
| Priority date | — |
| Expiry date | Sep 16, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2217/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
There is provided an electroacoustic transducer including: an oscillation device (10) that outputs a sound wave (30) from a first vibrating surface, and outputs a sound wave (32), having an opposite phase to that of the sound wave (30), from a second vibrating surface which is opposite to the first vibrating surface; a waveguide (40) that is provided on the first vibrating surface and that includes an open end (46); a waveguide (50) that is provided on the second vibrating surface, and includes an open end (56) which faces the same direction as the open end (46); and a sound wave filter (80) that is provided in the waveguide (50) and attenuates the sound wave (32).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.