croaky voice

If a person or their voice is croaky, their voice sounds rough because they have a sore or dry throat:

He has lost his sonorous voice and sounds a bit like a croaky Dalek.

SMART Vocabulary: related words and phrases

(Definition of croaky from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

He called into work with a croaky voice, saying he was ill.
I'm feeling much better now but I'm still croaky.

More examples
You sound quite croaky, have you got a sore throat?
It didn't sound like her voice, it sounded harsh and croaky.
He spoke in a croaky whisper.
She opened her mouth like she wanted to scream, but all that came out was a croaky “Water…”