Harmonic

Uncommon card · No. 147813

A harmonic is a sinusoidal wave whose frequency is a positive integer multiple of the fundamental frequency in a periodic signal. The fundamental counts as the first harmonic; the others are higher harmonics. Since all harmonics are periodic at the fundamental frequency, the sum of harmonics is also periodic at that frequency. The set of all possible harmonics is the harmonic series. The term is employed in various disciplines, including music, physics, acoustics, electronic power transmission, telecommunications, among others. For example, if the fundamental frequency is 50 Hz, a common AC power supply frequency, the frequencies of the first three higher harmonics are 100 Hz (2nd harmonic), 150 Hz (3rd harmonic), 200 Hz (4th harmonic) and any addition of waves with these frequencies is periodic at 50 Hz. An n {\displaystyle \ n} th characteristic mode, for n > 1 ,...

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