Collocations for audible - adj.

be
become, grow

clearly, perfectly
The shot was clearly audible in the silence.

barely, hardly, scarcely
faintly, just
The singer's voice was just audible.

almost

above
The noise was audible even above the roar of the engines.

to
The sounds made by bats are not audible to the human ear.

Audible is used with these nouns:
click, crack, gasp, groan, hiss, sigh, sound, voice, warning, whisper