PROBLEM TO BE SOLVED: To perform object sound extraction in which a high object sound extraction performance (noise removal performance) can be ensured by a small apparatus in acoustic environments where the object sound and other noises (non-object sounds) are mixed in acoustic signals obtained via a plurality of microphones and mixing conditions can vary.;SOLUTION: The object sound extraction apparatus includes sound source separation sections 10 for separating and generating an object sound separation signal corresponding to an object sound based on each combination of a main acoustic signal obtained through a main microphone receiving mainly input of the object sound and a plurality of other sub acoustic signals; and a spectrum approximation signal extraction processing section 32 for extracting an acoustic signal corresponding to the object sound from the plurality of object sound separation signals by extracting signal components meeting predetermined approximation conditions among signal components by a plurality of sectioned frequency bands of the plurality of separated and generated object sound separation signals.;COPYRIGHT: (C)2009,JPO&INPIT
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