Electroacoustic transducer
US12294831B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 10, 2023 |
| Grant date | May 6, 2025 |
| Priority date | — |
| Expiry date | Sep 25, 2043 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electroacoustic transducer includes a vibrating portion, a slit and an elastic film. The vibrating portion has a fixed end portion and a free end portion, and extends as a cantilever from the fixed end portion toward the free end portion along an extending direction orthogonal to a directivity axis to vibrate in a manner that the free end portion moves along the directivity axis. The slit is formed at two ends of the vibrating portion in a width direction orthogonal to the directivity axis and orthogonal to the extending direction. The elastic film is provided to close the slit in an axial direction that is aligned with the directivity axis. The slit includes a wide portion provided on a free end side and a narrow portion narrower than the wide portion. The elastic film is provided to close the wide portion while not closing the narrow portion.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.