Headphone apparatus
US5844998A · kind A · utility
30Cited by
4References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 8, 1997 |
| Grant date | Dec 1, 1998 |
| Priority date | — |
| Expiry date | May 8, 2017 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/1008
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A headphone apparatus comprising an acoustic unit for converting an audio signal to an acoustic sound, a supporting structure for supporting the acoustic unit keeping a predetermined distance to the ear of a listener and an acoustic equalizer provided in front of the acoustic unit for transferring the sound wave output from the acoustic equalizer to the ear of the listener after correcting the frequency characteristic thereof.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.