As part of a music special, New Scientist has a great selection of audio illusions on its web site, including Diana Deutsch’s phantom words as featured in Joe Banks’ Rorschach Audio piece in the first volume of SAJ.
Pictured here is the scale illusion:
Another effect first demonstrated by Diana Deutsch, this is an example of our brains “grouping” similar notes together. Two major scales are played: one ascending, one descending. However, the notes alternate from ear to ear – for instance, the right ear hears the first note of one scale, and then the second note of the other.
Pop over to New Scientist for more.
via Daily Grail
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