DEVICE, METHOD AND PROGRAM FOR REMOVING ACOUSTIC SIGNAL

摘要

PROBLEM TO BE SOLVED: To exclude a stationary sound to be a cause of erroneous estimation, to predict change of the sound which is going to be removed automatically and with high precision and to appropriately remove it in the case of removal processing in a mixed sound. SOLUTION: This device for removing an acoustic signal is provided with a stationary sound detection part 18 which detects the stationary sound in a mixed acoustic signal constituted by mixing a known acoustic signal which is going to be removed with other acoustic signals, an acoustic amplitude extraction part 200 which extracts acoustic amplitude spectrums from the acoustic signal and a removal processing part 104 which selects a mixed acoustic amplitude spectrum with frequency which does not coincide with frequency of the stationary sound among the extracted mixed acoustic amplitude spectrums and removes the known acoustic amplitude spectrum from the mixed acoustic amplitude spectrum with the selected frequency. COPYRIGHT: (C)2005,JPO&NCIPI