Patent ID: 8462962

Claim:
A sound processor comprising: a conversion unit converts a reference sound signal corresponding to a base of sound to be output by a sound outputting unit and an observation sound signal based on each of sound signals output by a plurality of sound receiving units into components on a frequency axis; an echo suppression unit estimates echo derived from sound based on a converted reference sound signal and suppresses an estimated echo in a converted observation sound signal with respect to each frequency component; a noise suppression unit estimates noise based on an arrival direction of sound that is obtained from a time difference between input sounds into the plurality of sound receiving units and suppresses the estimated noise in the converted observation sound signal with respect to each frequency component; and an integrating unit suppresses, with respect to each frequency component, echo and noise in the converted sound signal based on an observation sound signal obtained after echo suppression and an observation sound signal obtained after noise suppression, wherein the integrating process unit obtains the observation sound signal with the echo and the noise suppressed based on a product of a ratio of each frequency component between the observation sound signals obtained before and after the echo suppression and the observation sound signal obtained after the noise suppression, or the product of the ratio of each frequency component between the observation sound signals obtained before and after the noise suppression and the observation sound signal obtained after the echo suppression.