AUDI 231 Psychoacoustics Class provides the necessary basis for understanding how we hear the world around us. The course is multidisciplinary, with contributions from the academic disciplines of auditory physiology, physics, and psychology. It examines how the human auditory system processes the information it receives, that is, how physical attributes of sound translate into perceptual attributes such as loudness, pitch, and timbre. Topics extend to the perception of music, sound localization, speech, and beyond. Numerous audio-visual demonstrations are used to reinforce the theoretical material presented.