Did you know that as well as referring to noise, the word sound can also be used as an adjective to mean "good/correct" or "in good condition/healthy"?
She gave me some very sound advice.
I'm not sure how sound the basis for this argument is.
In good condition/healthy:
It's an old building, but it's still structurally sound.
He is of sound mind and body.
Can you make your own sentence with "sound" used in either of the above ways?