To provide an apparatus or the like for eliminating noise in a sound signal for surely eliminating the noise mixed in the sound.
A pitch analysis section 2 obtains a corrected moving average of a frequency of a sound pitch component represented by an original sound signal acquired by a sound input section 1. A variable filter 3 eliminates other components than the corrected moving average and its vicinity components obtained by a pitch analysis section 2 from the original sound signal to extract a pitch component. An absolute value detection section 4 obtains an absolute value of the pitch component and a low pass filter 5 filters a signal denoting the obtained absolute value to generate a gain adjustment signal. Then a delay section 6 adjusts a timing of the original sound signal and a gain adjustment section 7 amplifies or attenuates the resulting original sound signal at a gain depending on the gain adjustment signal and outputs the result.
KOJIMA HIROAKI
TANAKA KAZUYO
NAT INST OF ADV IND & TECHNOL
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