Noise canceling microphone with visual feedback
US5490219A · kind A · utility
4Cited by
5References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jan 21, 1993 |
| Grant date | Feb 6, 1996 |
| Priority date | — |
| Expiry date | Jan 21, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R3/00
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Briefly, according to the invention, a noise-cancelling microphone apparatus (400) is disclosed. The microphone (400) comprises a sound transducer (106) for converting sound waves to electrical signals and means for substantially preventing ambient noise from being converted to electrical signal. A circuit (100) is provided for determining the level of noise not prevented form being converted to electrical signal. The microphone (400) further includes a display (148) for indicating when the level of the ambient noise being converted to electrical signal is above a predetermined level.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.