Hearing aid
01
補聴器, 聴覚補助装置
a small electronic device that is worn in or behind the ear and is specifically designed to amplify inaudible sounds to help a person with hearing loss
02
補聴器の一種, 聴覚障害者用の音響デバイス
a conical acoustic device formerly used to direct sound to the ear of a hearing-impaired person
