Understanding Piano Octaves and Frequency: Middle C at 220Hz vs 440Hz #2060112 (License: Personal Use)

This diagram displays two adjacent piano octaves, each containing 12 semitones (C through B), with white keys labeled by natural notes and black keys by sharps/flats. Arrows indicate pitch direction (lower to higher), and frequency markers show that Middle C vibrates at 220Hz, while the C one octave above resonates at 440Hz-demonstrating the 2:1 frequency ratio defining an octave. The visual reinforces core music theory concepts for learners and musicians.

Used in music education pages, piano tutorials, acoustics explanations, or beginner theory guides; matches user intent to understand octave structure, note naming, and the relationship between pitch and frequency.