PROBLEM TO BE SOLVED: To provide an object sound extraction apparatus and so on which carry out object sound extraction which can secure a high object sound extraction function (noise removal function) by a small device under a sound environment where an object sound and noise other than that (non-object sound) is mixed into sound signals that can be get through a plurality of microphones and the mixed state can be changed.;SOLUTION: This apparatus is provided with a sound source separation processing part 10 which separates and generates reference sound separation signals corresponding to the reference sound other than the object sound based on both the acoustic signals with regard to a combination of a main acoustic signal that is obtained through a main microphone which mainly inputs an object sound with each of a plurality of subacoustic signals other than that and a spectrum subtraction processing part 31' which extracts acoustic signals corresponding to the object sound from the main acoustic signals by carrying out a spectrum subtraction processing among a plurality of the reference sound separation signals that are separated and generated.;COPYRIGHT: (C)2009,JPO&INPIT
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