audible

“What on earth is this?” I cried, for at this moment there came the pattering of many steps in the hall and on the stairs, accompanied by audible expressions of disgust upon the part of our landlady.

Then aside to Marilla in an audible whisper, “There wasn’t anything startling in that, was there, Marilla?”

Then suddenly another sound became audible—a very gentle, soothing sound, like that of a small jet of steam escaping continually from a kettle.

He listened for any sound that might be audible, and every time that he rose to the top of a wave he scanned the horizon, and strove to penetrate the darkness.