Canal type earphone with pressure equilibrium means
US9237394B2 · kind B2 · utility
23Cited by
2References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 2014 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | May 27, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2460/11
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein is a canal type earphone with a pressure equilibrium means, capable of eliminating a pressure difference between a user's external auditory meatus and an outside during wearing of the canal type earphone. A pressure equilibrium means includes a side air passage through which air within a tube or air within a speaker unit in the canal type earphone is discharged to a side surface of a gasket or a side surface of the speaker unit, and a rear air passage through which air in the side surface of the speaker unit is discharged to the rear of the speaker unit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.