Earphones
US8755550B2 · kind B2 · utility
5Cited by
2References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 20, 2013 |
| Grant date | Jun 17, 2014 |
| Priority date | — |
| Expiry date | Nov 20, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2499/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone includes a first acoustic chamber having a reactive element and a resistive element in a parallel configuration, a second acoustic chamber separated from the first acoustic chamber by an acoustic transducer and including a unitary port to provide both pressure equalization of the second chamber and equalization of the earphone to a predetermined frequency response, and a housing to support the apparatus from the concha of a wearer's ear and to extend the second acoustic chamber into the ear canal of the wearer's ear.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.