Polyphonic Aftereffects

Polyphonic aftereffects refer to the residual or lingering changes in sound perception caused by playing multiple notes simultaneously, especially after listening to complex harmonies or chords. When you hear a rich, layered piece of music, your auditory system processes the interactions between the different frequencies and pitches. After the sound stops, your brain can continue to perceive these interactions as lingering tonal influences or slightly altered perceptions of pitch and harmony. These aftereffects help explain why complex music can leave a lasting impression on your sense of pitch and tuning, even after the sound has ended.