Audio teleconferencing
US4237339A · kind A · utility
62Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1978 |
| Grant date | Dec 2, 1980 |
| Priority date | — |
| Expiry date | Oct 18, 1998 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R27/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An electro-acoustic terminal unit for use in an audio teleconferencing system comprises a loudspeaker and one or more microphones each having a sensitivity which is directionally dependent and exhibits at least one null or substantially null position. The loudspeaker and microphones are rigidly mounted on a boom and the microphones are so located and orientated relative to the loudspeaker that the null position is directed towards the loudspeaker.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.