Voice communication link interface
US5235637A · kind A · utility
26Cited by
12References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 13, 1992 |
| Grant date | Aug 10, 1993 |
| Priority date | — |
| Expiry date | Feb 13, 2012 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M1/6025
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An apparatus 10 controls the two-way communication between the microphone 12 and speaker 36 of a telephone headset and a telephone base. A transmit channel 15 includes an expander 18 that controllably attenuates the transmitted communication signal when the user is not speaking into the microphone 12. Conversely, a receive channel 30 includes a compressor 34 that controllably attenuates the received communication signal to prevent over driving the speaker 36.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.