Electromagnetic transducer with eccentrically mounted voice coil former
US7233681B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2004 |
| Grant date | Jun 19, 2007 |
| Priority date | — |
| Expiry date | Dec 24, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R7/12
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electromagnetic transducer such as an audio speaker which includes an asymmetric diaphragm to deliver smooth frequency response with reduced distortion by reduction of common modes in the diaphragm. Other benefits such as asymmetric directivity patterns can be realized. The asymmetric cone has a perimeter OD at which a surround may be coupled, and an ID at which a bobbin or spacer may be coupled. The center of the ID is not coincident with the center of the OD. The transducer further includes a stabilization mechanism for reducing rocking of the diaphragm assembly. The stabilization mechanism may include mass balancing of the diaphragm and/or adjustments to the location or symmetry of the suspension components.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.