Earphone
US5949896A · kind A · utility
291Cited by
1References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 13, 1997 |
| Grant date | Sep 7, 1999 |
| Priority date | — |
| Expiry date | Aug 13, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/2826
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An earphone with an improved frequency response includes an electroacoustic transducer for converting an audio signal to an acoustic sound and an ear piece. The ear piece is provided on a sound emanating side of the electroacoustic transducer to introduce sound produced by the electroacoustic transducer to the external auditory meatus. An opening for opening an air chamber formed on the sound emanating side of the electroacoustic transducer to the outside by the ear piece is provided in the ear piece and a ventilation resistant material is provided to cover the opening.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.