0 unable to hear, either completely or partly -- 耳聾的，聽不見的，失聰的
1 people who are unable to hear -- 聾人，耳聾者，失聰人士
Many of the TV programmes are broadcast with subtitles for the deaf. 很多電視節目播出時，都打上給失聰人士看的字幕。
Her father's going deaf.
She is deaf, but refuses to let her disability prevent her from doing what she wants to do.
