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Beamformer performance with acoustic vector sensors in air
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10.1121/1.2139073
/content/asa/journal/jasa/119/1/10.1121/1.2139073
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/1/10.1121/1.2139073

Figures

Image of FIG. 1.
FIG. 1.

(Color online) Collocated four-microphone array approximating an acoustic vector sensor in air. The top two and bottom right microphones have gradient responses; the microphone at bottom left has an omnidirectional response. Each sensor is .

Image of FIG. 2.
FIG. 2.

(Color online) Individual test results for all 24 one-interferer tests. Both sources are speech, and the interferer is only 15° from the target for these tests.

Image of FIG. 3.
FIG. 3.

(Color online) (a) SNR after processing with the two-channel algorithms. (b) SNRD after processing with the two-channel algorithms. (c) FWSNR after processing with the two-channel algorithms.

Image of FIG. 4.
FIG. 4.

(Color online) (a) SNR after processing with the three-channel algorithms. (b) SNRD after processing with the three-channel algorithms. (c) FWSNR after processing with the three-channel algorithms.

Image of FIG. 5.
FIG. 5.

(Color online) (a) SNR after processing with the four-channel algorithms. (b) SNRD after processing with the four-channel algorithms. (c) FWSNR after processing with the four-channel algorithms.

Tables

Generic image for table
TABLE I.

Source locations for two-dimensional tests.

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TABLE II.

Source locations for three-dimensional tests.

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TABLE III.

Algorithm parameters for best performance. For the FMV and RFMV algorithms, is the FFT length, is correlation length in FFTs, is the regularization value, and the vector controls robustness. For the GSC and RGSC algorithms, is the length of the adaptive filter, is the adaptive step-size parameter, and is the tap-weight leakage parameter.

Generic image for table
TABLE IV.

Performance for three-dimensional tests processed with the FMV algorithm. Each value is the average of the results from two test signals.

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/content/asa/journal/jasa/119/1/10.1121/1.2139073
2006-01-01
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Beamformer performance with acoustic vector sensors in air
http://aip.metastore.ingenta.com/content/asa/journal/jasa/119/1/10.1121/1.2139073
10.1121/1.2139073
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