I just learned about the delightful speech-to-song illusion

Our friends at Futility Closet wrote this post about the Speech-to-Song Illusion:

In 1995 UCSD psychologist Diana Deutsch was fine-tuning the spoken commentary on a CD when she noticed something odd. When the phrase “sometimes behave so strangely” was repeated on a loop, it came to sound as though it were being sung rather than spoken. When the full surrounding passage was then played in its entirety, this phrase still sounded as though it were being sung (you can hear this here).

The phenomenon is not completely understood, but “the present experiments show that for a phrase to be heard as spoken or as sung, it does not need to have a set of physical properties that are unique to speech, or a different set of physical properties that are unique to song,” the researchers write. “Rather, we must conclude that, assuming the neural circuitries underlying speech and song are at some point distinct and separate, they can accept the same input, but process the information in different ways so as to produce different outputs.”

The first few times I heard the narrator say "sometimes behave so strangely," I heard it as speech. Now, it is impossible for me to hear it as anything other than singing. Read the rest

Some people can hear this GIF

A lot of people can apparently hear this GIF. I can feel it.

The GIF was created by HappyToast. Read the rest

Audible illusion - this tone seems to rise in pitch forever

BTW: The folks at DeepMiningCorpAssoc sound like assholes.

From YouTube:

The shepard tone is an audio illusion which seems to get forever higher but never really does.

Whoever DeepMiningCorpAssoc is, STOP TRYING TO COPYRIGHT THIS! It doesn't have a single bit of your music in it!

Source of sound graph.

All sounds and images in this video are in the public domain and not copyrighted, feel free to use it!

Shepard tone sound was downloaded from Soundcloud (sound not copyrighted), (Thanks to a guy in the comments.)

From Wikipedia:

A Shepard tone, named after Roger Shepard, is a sound consisting of a superposition of sine waves separated by octaves. When played with the base pitch of the tone moving upward or downward, it is referred to as the Shepard scale. This creates the auditory illusion of a tone that continually ascends or descends in pitch, yet which ultimately seems to get no higher or lower. It has been described as a "sonic barber's pole".

Read the rest