Audio transducer with controlled flexibility diaphragm
US4584439A · kind A · utility
42Cited by
1References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Dec 1, 1983 |
| Grant date | Apr 22, 1986 |
| Priority date | — |
| Expiry date | Dec 1, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/047
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio transducer for reproducing sound. The transducer may be utilized as a loudspeaker or a microphone. The transducer comprises a frame on which is mounted a pair of opposing permanent magnets, which produce opposing magnetic fields and a flexible diaphragm which encloses an elongate looped coil and passes through the magnetic field. A signal of variable amplitude in the coil accompanies movement of the diaphragm in what is described herein as rolling, linear movement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.