These classroom demonstrations require the use of headphones or well separated left and right channels with stereo speakers. These tracks can also be heard on CD at the Music Library.
Track 1: Binaural beats: Can you hear the beats?
Track 2: Binaural localization (phase delay between two tones): Note that the difference in phase at the higher frequency is not easily noticed.
Track 3: Binaural localization (time delay between two clicks)
Track 4: Binaural localization (intensity difference between the two ears): Note the low frequency seems like a bug flying right by your ear. Whereas, the higher frequency could be perceived as a localized source a few feet away.
Track 5: Octave illusion
Track 6: High-low octave illusion
Track 7: Scale illusion
Track 8: Glissando illusion
Track 9: Binaural Masking (left ear staircase)
Track 10: Binaural Masking (left ear staircase + noise)
Track 11: Binaural Masking (left ear staircase + noise, right ear noise)
Track 12: Binaural Masking (left ear staircase + noise, right ear staircase + noise)
Tracks 1-4, 9-12 from "Auditory Demonstrations" by the Institute for Perception Research (1987).
Tracks 5-8 from "Musical Illusion
and Paradoxes" by Diana Deutsch
(1995) (see liner notes).