It's Shepherd ascending tones
not the scale illusion, oops!
listverse.com/miscellaneous/top-10-incredible-sound-illusions/
Here are some more toys for you to play with
(
Hellzapoppin, Sat 28 Feb 2009, 21:21,
Share,
Reply)
fuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuck
that's crazy
(
grey matter, Fri 13 Mar 2009, 17:01,
Share,
Reply)