What is another word for "inaudibility"?

Roget's Thesaurus (1911) lists these synonyms for "inaudibility": adder, beetle, close, deaf, deaf-mute, deafen, deafness, dull, ear, earless, evil, hard, hardness, have, hear, hearing, inaudible, out, post, render, shut, stone, stop, stun, surd, surdity, turn.