| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a sound processing device capable of suppressing noise while suppressing distortion of a sound signal even in a case where a direction of a sound source cannot be identified with accuracy.SOLUTION: A sound processing device 1 converts first and second sound signals generated by first and second sound input parts (2-1 and 2-2) into first and second frequency signals, calculates a phase difference between the first frequency signal and the second frequency signal for each frequency, calculates an abundance ratio from the number of frequencies that the phase difference between the first frequency signal and the second frequency signal is included in its extended range, for each extended range that is set out of a reference range or in the reference range of the phase difference between the first sound signal and the second sound signal for each frequency, that corresponds to an expected direction of a sound source of a sound collection target, and sets a first extended range that the abundance ratio is higher than a predetermined value, and a second extended range closer to a phase difference of the center of the reference range than the first extended range as a non-suppression range where the first and second frequency signals are not attenuated less than a suppression range together with the reference range.</p> |
