Audio signal processor, aural signal treatment manner, and aural signal treatment

摘要

PROBLEM TO BE SOLVED: To provide an audio signal processor which can extract a target sound selectively even under an environment where not only a direct sound but also a reflective sound exists.;SOLUTION: The audio signal processor has a first microphone 11, a second microphone 12 arranged in close proximity to the first microphone and having directivity differentiated from that of the first microphone, a first adaptive filter 18 performing adaptive filtering for a second sound signal output from the second microphone by using a first sound signal outputted from the first microphone as a target signal, a second adaptive filter 19 performing adaptive filtering for the error signal of the first adaptive filter by using the first sound signal as a target signal, and a third adaptive filter 22 performing adaptive filtering for the second sound signal by using the error signal of the second adaptive filter as a target signal.;COPYRIGHT: (C)2008,JPO&INPIT