partial tone

These are termed harmonic or partial tones, and they are related to the first partial or fundamental tone in a very simple manner, being multiples of the fundamental tone: thus—   FundamentalTone Upper Partials or Harmonics.

Compare what Helmholtz says regarding the repetition and coincidence of partial tones.

The brilliant sonorousness and roundness of the timbre of the horn are due to the strength and predominance of the partial tones up to the 7th or 8th.

The higher sounds that accompany the fundamental are called sometimes harmonics, sometimes upper partial tones, but generally overtones.

High sounds cannot obliterate low ones, but, on the contrary, the sensation of each partial tone of which compound musical sounds is formed is diminished by all the tones below it in pitch.