The book I have is somewhat dated, from my college days....but it is a
good introduction:
        Fundamentals of Hearing:  An Introduction
        Second Edition, 1985
        William A. Yost, Donald W. Nielson
        Publisher:  Holt, Rinehart and Winston,
        New York, NY
Good Luck!
Teri Cygnarowicz
TYC@FDADR.CDRH.FDA.GOV