Hearing aid, signal processing method, and program

摘要

A hearing aid, signal processing method and program enables TV sound to be made easier for a hearing aid user to hear when wishing to watch TV, and a person's voice to be made easier to hear when wishing to converse with that person. The hearing aid includes another-person's speech detection section that detects speech of a speaker other than the wearer using detected sound source direction information, an own-speech detection result, and a TV sound detection result, and a per-sound-source frequency calculation section that calculates the frequency of each sound source using an own-speech detection result, TV sound detection result, other-speaker's speech detection result, and sound source direction information. A scene determination section determines a scene using sound source direction information and a per-sound-source frequency; and an output sound control section controls hearing of the hearing aid according to a determined scene.

主权项

1. A hearing aid worn on both ears which has two microphone arrays respectively for both of the ears, the hearing aid comprising:
a sound source direction estimation section that detects a sound source direction from sound signals input from the microphone arrays; an own-speech detection section that detects a voice of a hearing aid wearer from the sound signal; a TV sound detection section that detects TV sound from the sound signal; another-speaker's speech detection section that detects speech of a speaker other than a wearer based on the detected sound source direction information, the own-speech detection result, and the TV sound detection result; a per-sound-source frequency calculation section that calculates, in each direction and for each sound source, a per-sound-source frequency which indicates how often the sound source is detected per predetermined time, based on the own-speech detection result, the TV sound detection result, the other-speaker's speech detection result, and the sound source direction information; a scene determination section that determines a scene using the sound source direction information and the per-sound-source frequency; and an output sound control section that controls a sound output from the hearing aid according to the determined scene, wherein the scene determination section performs scene classification for a “conversation scene” in which a wearer is engaged in conversation, a “TV viewing scene” in which a wearer is watching TV, and a “TV viewing while conversation scene” in which a wearer is simultaneously engaged in conversation and watching TV, and the output sound control section orients a directivity beam in a frontal direction in the “conversation scene”.