"sounded loud" is correct and usable in written English.
You can use it to emphasize the volume of a sound that was produced. For example, "His laughter sounded loud throughout the room."
The crinkling of the foil sounded loud to Gautama.
And the change sounded loud and clear at the conference of the annual Yalta European Strategy forum, which I attended.
Bassist John Entwistle stood still but looked and sounded loud and angry, stewing in his corner.
"You should have seen his face when our choir sounded loud and clear over the Berlin Philharmonic's brass".
It was mid-afternoon, and the bluegrass harmonies of the Old Crow Medicine Show coming through the speakers sounded loud in the uncrowded room.
The world sounded loud: a passing ambulance; human laughter; a howling fox; birdsong – everything passed through me at the same piercing pitch.
Though it may have sounded louder if you were telepathic.
The motor on the exhaust fan sounded louder than usual.
The gunfire sounded louder — closer — than before, and now Marie was trembling, sobbing, hyperventilating.
Florez, fabulous as always, sounded louder than I have ever experienced him in a theatre.
However, since then, the drum has sounded louder and louder against Moore.
