Audio driver
US8588449B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2010 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | May 19, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R9/022
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An audio driver including a diaphragm with a first side and a second side. The diaphragm is coupled to a transducer element on the second side and is arranged to radiate sound. The transducer element converts an electrical input signal into movement of the diaphragm. The diaphragm is arranged such that a part of the diaphragm at least partly forms a cavity at the second side of an air conduit is coupled to the cavity. The air conduit has a first opening into the cavity and a second opening outside of the cavity. The air conduit and cavity form a resonator which has a resonance frequency that is less than half a free air acoustic resonance frequency of the audio driver.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.