Indicates total hearing loss. It's not just hard of hearing, it's no hearing at all.

Hearing Loss

Can describe a momentary condition, such as after a loud noise.

Temporary Situation

Used informally, often exaggerated for effect in everyday conversation.

Used to suggest deliberate ignorance or refusal to acknowledge something.

Can imply frustration or annoyance from the speaker towards the one ignoring.

Often not about hearing, but about someone's attitude or response.