Harmonic series

Every single tone sounding creates a series of sympathetically sounding overtones. The simplest series of overtones is the harmonic series.

Definition

The harmonic series is a sequence of harmonics, of overtones and a fundamental, ordered and represented by whole numbers and their inversions.

As the harmonic series progresses upwards, the intervals gradually become smaller.

Harmonics 4, 5 and 6 form a major triad; 4, 5, 6 and 7 an approximate dominant seventh chord.

Notation

The series below gives an approximation of the pure harmonics 1 through 16, with the help of quarter tones:

See also

• Outline of basic music theory