hearing aids

名词 hearing aid:

1. an electronic device that amplifies sound and is worn to compensate for poor hearing
   同义词：hearing aid, deaf-aid
2. a conical acoustic device formerly used to direct sound to the ear of a hearing-impaired person
   同义词：hearing aid, ear trumpet

1. A part, as of a telephone receiver or hearing aid, that fits in or is held next to the ear.
   耳塞电话接收器或助听器上嵌入耳中或附著在耳上的部分
2. I got my hearing aid on the National Health (Service).
   我的助听器是国民保健署资助的。