Frequency weighting in broadband acoustic beamforming
US11578588B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jul 12, 2016 |
| Grant date | Feb 14, 2023 |
| Priority date | — |
| Expiry date | Dec 25, 2039 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01V2210/43
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Disclosed are systems and methods for processing broadband acoustic signals acquired by a plurality of acoustic sensors, using an array-signal-processing technique to compute fused-signal maps in the frequency domain for a plurality of frequency bins. In accordance with various embodiments, the fused-signal maps are combined across the frequency bins, with respective weightings that are based on eigenvalues of covariance matrices computed for the plurality of frequency bins. The combined maps can be used to locate an acoustic source in a wellbore.
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