To provide an apparatus and a method for detecting the location of a sound source, which can detect the position (in the vertical and horizontal directions) of the sound source located ahead, using a simple structure having a small number of microphones.

The apparatus is equipped with right-and-left reflecting members 12 which are positioned at a prescribed spacing laterally, in relation to the sound source 1 located ahead; right-and-left microphones 14 which receive reflection sounds 1b reflected by respective reflecting members, as well as direct sounds 1a from the sound source; and a position-detecting device 16 which detects the position of the sound source, based on the received sounds from both the microphones. The right-and-left reflecting members 12 have at least one portion of a rotating plane, as a reflecting plane 12a which is obtained, by rotating a curved profile, having different reflection distances in the vertical directions about the vertical axis passing through the microphone. In the position-detecting device 16, the position of the sound source in the horizontal direction is detected, based on the difference between arrival time values of the reception sounds for the right-and-left microphones, and the position of the sound source in the vertical direction is detected, based on the spectral information of the received sounds.