The recipient of bardic inspiration must be able to hear the bard.

...choose one creature other than yourself within 60 feet of you who can hear you.

An unconscious creature is "unaware of its surroundings."

An unconscious creature is incapacitated, can't move or speak, and is unaware of its surroundings

Can creatures can still be affected subconsciously by things they hear while they are unconscious, despite being unaware of their surroundings?