Unidirectional second order gradient microphone
US4742548A · kind A · utility
33Cited by
12References
13Claims
0Family size
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Inventors
Key dates
| Filing date | Dec 20, 1984 |
| Grant date | May 3, 1988 |
| Priority date | — |
| Expiry date | Dec 20, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R1/406
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A second order gradient microphone with unidirectional sensitivity pattern is obtained by housing each of two commerically available first order gradient microphones centrally within a baffle. The baffles have flat surfaces, are preferably square or circular and have parallel surfaces the two baffles being parallel to each other. The rotational axes of the microphones are arranged to coincide. The output signal from one of the microphones is subtracted from the delayed signal output of the other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.