Enharmonic equivalence refers to pitches that sound different but are notated the same on the piano keyboard

Enharmonic equivalence allows for multiple notations of the same pitch, corresponding to adjacent keys on the piano within the chromatic scale

The concept of enharmonic equivalence is used to explain why the chromatic scale has more than 12 notes on a piano

Enharmonic equivalence demonstrates that each key on a piano can produce multiple distinct pitches in the chromatic scale