| 摘要 |
PROBLEM TO BE SOLVED: To suppress generation of abnormalities, such as noise and howling, caused by a hearing aid case rubbing with an external object and outputs a clear easy-to-hear sound from an earphone.SOLUTION: The hearing aid 10, outputting a sound collected by a voice microphone 16 from an earphone 19, includes: a voice microphone 16 that collects an external sound and converts the sound into an electric signal; a noise microphone 17 that collects a noise in a housing of the hearing aid 10 and converts the noise into an electric signal; a subtraction section 22 that subtracts a noise microphone electric signal as an electric signal through the noise microphone 17 from a sound microphone electric signal as an electric signal through the sound microphone 16; and an earphone 19 that converts a subtracted electric signal into a sound for output. |
