How the Ear Works - Covers the process by which sound is converted to activity in the audiotory nerve and is aimed at a broad audience. The focus is more on hair cell physiology than on cochlear mechanics. - http://www.bcm.edu/oto/research/cochlea/Volta/index.html
Promenade Around the Cochlea - Interactive presentation of the anatomy, physiology and pathophysiology of the peripheral end-organ. Aimed at medical and biology students, and available in French and English. - http://www.iurc.montp.inserm.fr/cric/audition/
An Inner Ear Primer - Tulane University - Brief overview of the inner ear functioning and the main pathophysiology of the auditory and vestibular systems. - http://www.mcl.tulane.edu/departments/pathology/fermin/InnerEarPrimer.html
HowStuffWorks: How Hearing Works - Illustrated tutorial traces the path of a sound, from its original source all the way to your brain, to show how all the parts of the ear work together. - http://www.howstuffworks.com/hearing.htm
Virtual Tour of the Ear - Index of sites covering human and animal audiology, including case studies, diseases and disorders, and development. - http://ctl.augie.edu/perry/ear/tours.htm
Anatomy of Auditory - Systematic presentation of light microscope, electron microscope, and scanning electron microscope images of ear structures. Basic anatomy, but the structural basis of the physiology of hearing is well shown. - http://www.neurophys.wisc.edu/~ychen/auditory/fs-auditory.html