Would humans hear gravity waves from a binary BH fusion nearby? The frequency of the gravity waves detected by aLIGO recently were in the audible sound spectra. Actually spanning over half of the keys of a piano, I've been told, during 2/10 or so seconds.

Would a human ear sense a gravity wave if powerful enough? The waves going through empty space from the event horizons, through the walls of a spacecraft and through the ears of astronauts. Would one actually hear a "zip" sound because space makes waves inside our ears?
As your ear is extremely small compared to the wave length of the gravity waves, remember they travel at the speed of light not the speed of sound. The structures in the ear would not respond, also the ear would change in size (by a  ridiculously small amount) itself, thus nullifying the effect anyway. LIGO works by comparing the light travel time of two laser beams at precise right angles, your ear is not directional like that.