Low noise differential microphone arrays
US9237391B2 · kind B2 · utility
35Cited by
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15Claims
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Key dates
| Filing date | Dec 4, 2012 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Dec 2, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04R2430/03
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A differential microphone array (DMA) is provided that includes a number (M) of microphone sensors for converting a sound to a number of electrical signals and a processor that is configured to apply linearly-constrained minimum variance filters on the electrical signals over a time window to calculate frequency responses of the electrical signals over a plurality of subbands and sum the frequency responses of the electrical signals for each subband to calculate an estimated frequency spectrum of the sound.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.