They all did so, Auntie Muriel grumbling audibly; he waved his wand again.
"Ron!" said Hermione, this time clearly audible over the rain thundering on the tent roof, but again, he ignored her.
The whisper was barely audible, her lips were an inch from his ear, her head bent so low that her long hair shielded his face from the onlookers.
Hermione screamed again from overhead, and they could hear Bellatrix screaming too, but her words were inaudible, for Ron shouted again, "HERMIONE!
The house-elves of Hogwarts swarmed into the entrance hall, screaming and waving carving knives and cleaver, and at their head, the locker of Regulus Black bouncing on his chest, was Kreacher, his bullfrog’s voice audible even above this din: "Fight!
There are no more uses of "audible" in the book.
Show samples from other sources
She spoke in a barely audible whisper.
It was so quiet, our breathing was the only thing audible in the room.