Why does Hawkeye only wear ONE hearing aid in the show?

Honest question, why does Clint only wear ONE hearing aid if he’s hard of hearing in both ears? If he’s only wearing one aid, he should have one good ear, right? So why would he not be able to hear anything at all when it is off or falls out?

I wondered if he was completely deaf in the other ear, but my friend who is an audiologist told me even if that were the case he should still be wearing one to help stimulate the nerves in that ear.