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Localization of multiple acoustic sources with small arrays using a coherence test
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10.1121/1.2871597
/content/asa/journal/jasa/123/4/10.1121/1.2871597
http://aip.metastore.ingenta.com/content/asa/journal/jasa/123/4/10.1121/1.2871597

Figures

Image of FIG. 1.
FIG. 1.

Block diagram of the localization algorithm with variants 1 and 2.

Image of FIG. 2.
FIG. 2.

Decibel magnitudes of the responses from the HA6 array in free-field (a) omnidirectional microphone and (b) and (c) two orthogonal gradient microphones.

Image of FIG. 3.
FIG. 3.

Decibel magnitudes of the responses from the HA6 array on the left ear of a KEMAR (a) omnidirectional microphone and (b) and (c) two orthogonal gradient microphones.

Image of FIG. 4.
FIG. 4.

MUSIC spectra from of four simultaneous speech sources using the measured responses of the array on the KEMAR head. Dashed lines show the sources’ true DOAs (, , , and ). (a) and (b) MUSIC spectra as a function of frequency and azimuth using variants 1 and 2 and (c) and (d) final MUSIC spectra using variants 1 and 2.

Image of FIG. 5.
FIG. 5.

MUSIC spectra as a function of time and azimuth for of four simultaneous speech sources using the measured responses of the array on a KEMAR. MUSIC spectra were computed every, (a) 100 and (b) . Dashed lines show the sources’ true DOAs (, , , and ).

Image of FIG. 6.
FIG. 6.

MUSIC spectrum as a function of time for an acoustic scene consisting of an M60, a HEMET, and small arms fire.

Tables

Generic image for table
TABLE I.

Bias of the DOA estimates using the MUSIC spectrum.

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TABLE II.

Standard deviation of the DOA estimates using the MUSIC spectrum.

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TABLE III.

Average number sources localized per trial using the MUSIC spectrum.

Generic image for table
TABLE IV.

Percent of trials that did not localize all sources using the MUSIC spectrum.

Generic image for table
TABLE V.

Mean locations and standard deviations of location estimates with uncorrelated additive noise.

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/content/asa/journal/jasa/123/4/10.1121/1.2871597
2008-04-01
2014-04-17
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Localization of multiple acoustic sources with small arrays using a coherence test
http://aip.metastore.ingenta.com/content/asa/journal/jasa/123/4/10.1121/1.2871597
10.1121/1.2871597
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