Electroacoustic transducer
US7324655B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jul 4, 2003 |
| Grant date | Jan 29, 2008 |
| Priority date | — |
| Expiry date | Jun 8, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2400/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A small earphone or headphone which can produce a wide band acoustic output from a low-pitched tone to a high-pitched tone and can generate a body-sensitive vibration independent output or a body-sensitive vibration output synchronized with a music. The earphone or headphone is mounting a vibration actuator which is provided with a magnetic circuit including a permanent magnet, a yoke, and a plate for concentrating the flux of the permanent magnet, with a coil disposed in an air gap of the magnetic circuit, with a diaphragm fixed with the coil and being imparted with a driving force therefrom, and with a vibration transmitting section for supporting the magnetic circuit flexibly through a suspension comprising a flexible spring.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.