Sound Collection Device, Sound Collection Method, And Sound Collection Program

Abstract: A sound collection device (1): performs a Fourier transform on a first received sound signal (x1(t)) output from a first microphone (11a) and outputs a first signal (X1(?,t)); performs a Fourier transform on a second received sound signal (x2(t)) output from a second microphone and outputs a second signal (X2(?,t)); estimates an audio arrival direction (?); calculates the phase (FD(?,t)) of a cross-spectrum of the first signal and the second signal; determines a mask coefficient (b(?,t)) on the basis of an arrival direction phase table (15) that indicates correlations between phase and arrival direction for each frequency band (f), the calculated phase (FD(?,t)), and the estimated arrival direction (?); isolates a signal (Y(?,t)) from the first signal or the second signal using the mask coefficient; and performs an inverse Fourier transform on the isolated signal and outputs a target audio signal.

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