Dinei Florencio, Warren Lam, and Jinyan Su
Previous research in sound source localization has helped
increase the robustness of estimates to noise and reverberation.
Circular arrays are of particular interest for a number of
scenarios, particularly because they can be placed in the center
of the sources. First, that improves the sound capture due to the
reduced distance. Second, it helps on the direction estimation,
not only because of the reduced distance, but also because it
increases the angle differences. Nevertheless, most research on
circular arrays focused on the case of omni-directional
microphones. In this paper we present a new algorithm for sound
source localization developed specifically for directional
microphones. Results obtained from real meeting room setups
show a typical error of less than 3 degrees.