täisarvuline osa signaali põhisagedusest, st 1/n korda põhisagedust, kus n on täisarv, mis on suurem kui 1, sinusoidal component of a periodic quantity having a harmonic frequency, frequency that is an integer fraction of the fundamental frequency of the signal, that is, 1/n times the fundamental frequency, where n is an integer greater than 1