Localization of multiple acoustic sources with small arrays using a coherence test

Satish Mohan, Michael E. Lockwood, Michael L. Kramer, Douglas L. Jones

Research output: Contribution to journalArticlepeer-review


Direction finding of more sources than sensors is appealing in situations with small sensor arrays. Potential applications include surveillance, teleconferencing, and auditory scene analysis for hearing aids. A new technique for time-frequency-sparse sources, such as speech and vehicle sounds, uses a coherence test to identify low-rank time-frequency bins. These low-rank bins are processed in one of two ways: (1) narrowband spatial spectrum estimation at each bin followed by summation of directional spectra across time and frequency or (2) clustering low-rank covariance matrices, averaging covariance matrices within clusters, and narrowband spatial spectrum estimation of each cluster. Experimental results with omnidirectional microphones and colocated directional microphones demonstrate the algorithm's ability to localize 3-5 simultaneous speech sources over 4 s with 2-3 microphones to less than 1 degree of error, and the ability to localize simultaneously two moving military vehicles and small arms gunfire.

Original languageEnglish (US)
Pages (from-to)2136-2147
Number of pages12
JournalJournal of the Acoustical Society of America
Issue number4
StatePublished - 2008
Externally publishedYes

ASJC Scopus subject areas

  • Arts and Humanities (miscellaneous)
  • Acoustics and Ultrasonics


Dive into the research topics of 'Localization of multiple acoustic sources with small arrays using a coherence test'. Together they form a unique fingerprint.

Cite this