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DoA Reliability for Distributed Acoustic Tracking

: Evers, C.; Habets, E.A.P.; Gannot, S.; Naylor, P.A.

Fulltext ()

IEEE Signal Processing Letters 25 (2018), No.9, pp.1320-1324
ISSN: 1070-9908
ISSN: 1558-2361
Journal Article, Electronic Publication
Fraunhofer IIS ()

Distributed acoustic tracking estimates the trajectories of source positions using an acoustic sensor network. As it is often difficult to estimate the source-sensor range from individual nodes, the source positions have to be inferred from the direction-of-arrival (DoA) estimates. Due to reverberation and noise, the sound field becomes increasingly diffuse with increasing source-sensor distance, leading to a decreased Direction of Arrival (DoA)-estimation accuracy. To distinguish between accurate and uncertain DoA estimates, this letter proposes to incorporate the coherent-to-diffuse ratio as a measure of DoA reliability for single-source tracking. It is shown that the source positions, therefore, can be probabilistically triangulated by exploiting the spatial diversity of all nodes.