Experience famous auditory illusions generated in real-time. Headphones recommended for best effect! 🎧
An endlessly rising (or falling) pitch that never actually gets higher. The "barber pole" of sound — your brain is being tricked!
A beat that seems to accelerate forever but never actually gets faster. The rhythmic cousin of the Shepard Tone.
Two slightly different frequencies in each ear create a perceived "beating" tone. Used for relaxation and focus. You MUST use headphones!
⚠️ Headphones required. Each ear gets a different frequency.
Two Shepard tones a half-octave apart. Some people hear it going UP, others DOWN. Depends on your native language and musical experience!
You hear a low note... but it isn't there! Only the harmonics are playing — your brain fills in the missing bass note automatically.
High and low tones alternate between ears. Most right-handers hear the high tone in the right ear — even when it's in the left! Discovered by Diana Deutsch.
⚠️ Headphones required. Try swapping L/R earbuds!
Play two loud tones and hear a THIRD tone that doesn't exist! Your inner ear generates it via nonlinear distortion (f2 - f1).
A rising glissando with alternating tones in each ear. Your brain "captures" the glide and assigns it to one ear, ignoring reality!
⚠️ Headphones recommended for spatial effect.