DOA Estimation in Car for Abnormal Sound Localisation

Guan, Luyang, Fengshou, Gu, Fazenda, Bruno, Ball, Andrew, Yichun, Yang and Pengxiao, Teng (2009) DOA Estimation in Car for Abnormal Sound Localisation. In: 8th International Conference on Damage Assessment of Structures, 3-5 August 2009, Beijing, China. (Submitted)

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Abstract

Spurious noise in car cabinet can be not only annoying bust also indicative of some
potential faults. A small square microphone array with 4 sensors was adopted in this paper to
localize the sound source in car for fault diagnosis. A new voice activity detection (VAD) algorithm
was proposed for the typical discontinuous short-time noise in car due to some fault and applied to
direction of arrival (DOA) estimation as a pre-processing stage. Four different time delay estimation
methods were compared based on the measurements from a typical passenger. Experimental results
illustrate that the VAD algorithm is crucial to achieve robust fault localization performance and the
generalized cross-correlation method with phase transform weighting function is an appropriate
fault localizer in car.

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