A novel approach is presented for acoustic localization based on Time Delay Estimation (TDE). The proposed method relies on the observation that the spectrum of many real-world ambient noise types sufficiently satisfies the assumption of sinusoid stationarity. By employing noise phase spectrum projection, we approximate the phase information of the equivalent clean source signals received by the microphone array. The phase-modified signals can be effectively used with different methods of conventional TDE. The proposed approach is evaluated with real noise data and for different reverberation times. Experimental results confirm the suitability of the sinusoid stationarity concept and show that the proposed method performs well under both reverberant and noisy acoustic conditions.
Bibliographic reference. Athanasopoulos, Georgios / Verhelst, Werner (2013): "A phase-modified approach for TDE-based acoustic localization", In INTERSPEECH-2013, 2890-2894.