Patent ID: 8792652

Claim:
A noise suppressing device that suppresses a noise component included in received sounds, the noise suppressing device comprising: a memory that stores a program including a procedure; and a processor that executes the program, the procedure including: inputting a plurality of sounds from a given sound source and converting the sounds to sound signals on a time axis; performing a frequency transform of the sound signals after dividing the sound signals into units of a frame and calculating respective transfer characteristics of the sounds transmitted from the sound source for each of at least one frequency band; storing the transfer characteristics of the sounds calculated for each frequency band; calculating, for each frequency band, a changing rate of the transfer characteristics over time, obtaining, in response to the changing rate calculated, a frequency for updating the transfer characteristics stored for each frequency band; updating the transfer characteristics stored every given number of frames corresponding to the frequency obtained for each frequency band; generating suppression information for suppressing the noise component based on the transfer characteristics as updated; and suppressing the noise component based on the suppression information generated.