Acoustic loudspeaker
US9071898B2 · kind B2 · utility
2Cited by
15References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 27, 2011 |
| Grant date | Jun 30, 2015 |
| Priority date | — |
| Expiry date | Jul 14, 2031 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/13
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Acoustic loudspeaker comprising: a movable membrane; a source of constant magnetic field, a coil mechanically secured to said membrane and interacting with the magnetic field so as to displace the membrane, when it is traversed by an alternating current, characterized in that the membrane carries the coil at its periphery, and in that the magnetic field source is formed by a set of at least one magnetized element disposed at the periphery of said membrane, around the coil, the magnetic field generated by said at least one magnetized element being in a plane parallel to the membrane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.