A must-read, lucid and wide ranging, is Prof Nina Kraus' recent book 'Of Sound Mind'. As a musician/neuroscientist she has particular insight. A must-hear, on her Brainvolts website, is the recording via electrodes of what a subject is hearing. Not exactly hi-fi, but completely recognisable on music and speech! I have no connection with Prof Kraus, and am no academic, but have been busy in sound creation lifelong. It's great to go on being astonished! Apparently the ear is even more engaged with the mind, two way, than the eye.