Earpiece acoustics
US6473625B1 · kind B1 · utility
83Cited by
12References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 28, 1998 |
| Grant date | Oct 29, 2002 |
| Priority date | — |
| Expiry date | Dec 28, 2018 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A radiotelephone is provided which comprises a housing 1 having an earpiece port 4, a loudspeaker 6 and a resonator. The resonator comprises and earpiece path form the loudspeaker to the earpiece port4. Further, the resonator also comprises an internal cavity 7, which may be ring, and a path 8 from the loudspeaker 6 to the internal cavity 7, to provide a specified resonance performance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.