Synonyms:
inaudible, unhearable
Meaning: impossible to hear; imperceptible by the ear; "an inaudible conversation"
Usage examples
The sound of the young man's footsteps ascending the stairs became inaudible, and the house was quiet.
They can catch the squeak of a mouse at a distance which, for ordinary ears, would make the sharp clucking of a chipmunk inaudible.
That's all very well, but'--he paused, and nodded, nodding his round head upward as if towards the inaudible overhead, 'I suppose he can't HEAR?'
A fresh signal, inaudible, imperceptible to all but themselves, and once more, in a trice, the narrow, smoothly-gliding hunting-column is reformed.
The ship rose to a great height, and headed westward at such speed that the hum of the air past its smooth plates rose to a shrill, almost inaudible moan.