Before Dean could answer, there was an almost inaudible knock at the door.
Should be inaudible by an ear placed in the water.
The only co-operation which is commonly possible is exceedingly partial and superficial; and what little true co-operation there is, is as if it were not, being a harmony inaudible to men.
If an ear-trumpet is placed at the focus of the second mirror the ticking may be heard easily, though it is quite inaudible by direct waves.
MUSIC OF THE SPHERES, in Pythagorean philosophy, the harmony produced by the heavenly bodies in their orbits, inaudible to human ears.
Among his other papers may be mentioned those dealing with the formation of fairy rings (1807), a synoptic scale of chemical equivalents (1814), sounds inaudible to ordinary ears (1820), the physiology of vision (1824), the apparent direction of the eyes in a portrait (1824) and the comparison of the light of the sun with that of the moon and fixed stars (1829).
The sound was nearly inaudible but both stopped and listened attentively.
The spoken words that are inaudible among the flying spindles; those same words are plainly heard without the walls, bursting from the opened casements.