ACOUSTIC PROCESSING APPARATUS, METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To detect sound distortion during reproduction, without requiring a calibration.SOLUTION: A setting section 11 sets a reproduction sampling frequency Fand a record sampling frequency F(>F). A DAC section 12 converts a sound source signal into a reproduction signal on the basis of the F. An ADC section 13, on the basis of the F, converts a recording signal in which a reproduction sound according to the reproduction signal is recorded into an input signal. A signal separation section 15 divides the input signal into a low-frequency signal included in a band lower than that having the Fand a high-frequency signal included in a band higher than that having the F. A sound distortion detection section 16 detects whether or not sound distortion is generated in the reproduction sound, on the basis of power of the high-frequency signal or a difference or a ratio between power of the high-frequency signal and power of the low-frequency signal.