listen out for

US /ˈlɪs.ən aʊt fɔːr/
UK /ˈlɪs.ən aʊt fɔːr/
"listen out for" picture
1.

to make an effort to hear a particular sound or sounds

:
Can you listen out for the doorbell while I'm in the shower?
We need to listen out for any strange noises from the engine.