Robust speech localization using formant phase subtraction
Parham Aarabi, Vaughan Pratt · The Journal of the Acoustical Society of America · 2000
This paper examines the benefits of a context aware time difference of an arrival-based speech localization system. This approach uses information about the formant structure of the speaker in order to compute a more robust time difference of arrival between two microphones. This ability allows microphone arrays to localize speech in environments with signal-to-noise ratios as low as −10 dB, when the noise source is another speaker, and −4 dB, when the noise source is white Gaussian.