Noise-discriminating voice-switched two-way intercom system
US4006310A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 15, 1976 |
| Grant date | Feb 1, 1977 |
| Priority date | — |
| Expiry date | Jan 15, 1996 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M9/10
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
An intercom system for remote banking which facilitates communication between a teller terminal and a remotely located customer terminal. A two-way speaker is provided at the customer location and a separate microphone and a speaker are provided at the teller location. An amplifier in the communication path linking the two stations is connected such that normally its input is responsive to the customer two-way speaker with its output feeding the teller speaker, permitting the customer to talk to the teller. When the teller speaks into the microphone, and assuming certain conditions are met, the amplifier automatically switches to connect the teller microphone to the amplifier input and the customer two-way speaker to the amplifier output, permitting the teller to talk to the customer. To avoid switching communication direction in response to noise at the teller location, the system is additionally provided with a noise microphone located at the teller station for transducing ambient noise thereat, and means responsive to the output of the noise and teller microphones for switching the system to the teller speech transmission mode only when a source of teller speech is located withi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.