Telephone mouthpiece for preventing wind noises and method for reducing wind noises input thereto
US5701354A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 10, 1995 |
| Grant date | Dec 23, 1997 |
| Priority date | — |
| Expiry date | Oct 10, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2410/07
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The telephone mouthpiece of the present invention comprises a microphone unit 3, a unit housing section 1 and an acoustic duct section 2 tightly fitted to the unit housing section 1. The unit housing section 1 comprises a flat plate 11 and a cylindrical housing 12 housing the microphone unit 3 provided on the flat plate 11. The acoustic duct section 2 comprises: an acoustic duct box 21 in the form of a box in close contact with the corresponding flat plate 11; and a cylindrical box 22 in close contact with the cylindrical box 12 at an end of the acoustic duct box 21; partitions 23 and 24 for partitioning inside of the acoustic duct box 21 into a plurality of air chambers; and slits 29 and 30 provided on the partitions 23 and 24.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.