not used in progressive tenses
1 a : to be aware of (sound) through the ear
Do you hear that music?
I can't hear you. = I can't hear what you are saying.
I couldn't hear a word of what he said over all that noise.
I thought I heard him leave.
He was heard leaving. = He was heard to leave.
[no object] b [+ object] : to listen to (someone or something)
I heard her in concert a few years ago.
Have you ever heard Wagner sung/performed in English?
The committee will hear witnesses today.