Telephone transmission installation between interlocutors in a noisy environment
US4243837A · kind A · utility
6Cited by
1References
15Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 15, 1978 |
| Grant date | Jan 6, 1981 |
| Priority date | — |
| Expiry date | Aug 15, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6008
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An arrangement for controlling a telephone transmission line having an input linked to a sound detection device located in a noisy environment. The transmission line operates only for the transmission of words received by the sound detection device. The transmission line is made operative or inoperative according to whether sound energy variation collected by the sound detection device for duration of a predetermined time interval is superior or inferior to a predetermined approximate audio level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.