Page 7: The Way We Perceive Sounds
Please go to this site and try the audio link that says PLAY DESCENDING TONES. http://www.unl.edu/secd/psychoa/experiments/shepard1.html
This audio link is an illusion of a series of tones that descend in pitch until they are half of their initial frequency. This is a trick. We think that we should be able to tell when the tone changes in pitch. We cannot perceive the pitch change because there is also a constant change in volume.
This is a wonderful demonstration of how our brain perceives sounds. This shows that both pitch and volume counterpart each other in our brains.
image taken from source #8, http://www.loni.ucla.edu/data/human/
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