Acoustic transducer
US9173022B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 26, 2014 |
| Grant date | Oct 27, 2015 |
| Priority date | — |
| Expiry date | Jun 26, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2205/021
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An acoustic transducer (104) is shown, which may be configured as either a loudspeaker or a microphone. The acoustic transducer includes a magnet system (401), and a diaphragm (303) having a conductive element (402) disposed on it. The conductive element has a first outer conductive portion (405) and a second outer conductive portion (407) for generating force parallel to the magnet system. It also has a central conductive portion (406) for generating force normal to the magnet system. In this way, application of an audio frequency signal to the conductive element, possibly via positive and negative input terminals (202, 203), causes oscillation of the diaphragm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.