Sonic Illusions: Can you really trust your ears?
Twenty Thousand Hertz
Sound Illusions Can Really Mess With Your Mind
Sonic illusion known as the shepherd tone, named after cognitive scientist Roger Shepherd. It gives listeners impression that sound is constantly going up or down in pitch but never resolving. Christopher Nolan based Dunkirk score on concept of a "continuing rise in intensity narratively" This has led to some serious debate on the internet about whether it's Laurel or Yanny.
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