SOUND PROCESSING APPARATUS, SOUND PROCESSING METHOD AND HEARING AID

摘要

The present invention provides a sound processing apparatus, a sound processing method and a hearing aid for efficiently emphasizing the sound of an utterer close to the user regardless of the distance between microphones. By using output signals from a plurality of omnidirectional microphones, respectively, the sound processing apparatus outputs a first directivity signal in which the main axis of directivity is formed in the direction of the utterer and outputs a second directivity signal in which the dead zone of directivity is formed in the direction of the utterer. The sound processing apparatus calculates the level of the first directivity signal and the level of the second directivity signal, and determines the distance to the utterer based on the level of the first directivity signal and the level of the second directivity signal. The sound processing apparatus derives a gain to be given to the first directivity signal according to the result of the determination and controls the level of the first directivity signal by using the gain.