Some other pages on our site you may enjoy:
HEARLOSS - Hearing Impairment Demonstrator
HearLoss is a free interactive Windows PC program for demonstrating to normally hearing people the effects of hearing loss. More information.
ESYSTEM - Signals and Systems teaching tool
ESYSTEM is a free program for experimenting with signals and systems. With ESYSTEM you can see the effect of simple systems on a range of simple signals. More information.