An apparatus and method for localizing a sound source in a robot are
provided. The apparatus includes a microphone unit implemented by one or
more microphones, which picks up a sound from a three-dimensional space.
The apparatus also includes a sound source localizer for determining a
position of the sound source in accordance with Time-Difference of
Arrivals (TDOAs) and a highest power of the sound picked up by the
microphone unit. Thus, the robot can rapidly and accurately localize the
sound source in the three-dimensional space with minimum dead space,
using a minimum number of microphones.