Active noise reduction audiometric headphones
US6532296B1 · kind B1 · utility
27Cited by
5References
12Claims
0Family size
Inventors
Key dates
| Filing date | Jul 29, 1998 |
| Grant date | Mar 11, 2003 |
| Priority date | — |
| Expiry date | Jul 29, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K2210/116
- WIPO fieldOther consumer goods
- WIPO sectorOther fields
Abstract
Active noise reduction headphones for audiometry where the earphone portion of said headphones has a cavity volume greater than 6 cc and including an acoustic-electric sensing means and an electro-acoustic transducing means which are used cooperatively and which has additional passive noise control means in the form of a circumaural seal around the ear for improving high frequency noise control performance, the headphone having a summing junction for combining the active noise reduction signal and an audiometry test signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.