Pitch

Pitch (a.k.a. "frequency") is the acoustic quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies. Or, as we deal with often as pipers, pitch allows us to judge the tuning of notes as being "flat" (too low in pitch) or "sharp" (too high in pitch). Pitch is measured in "Hertz" (Hz)

Synonyms:
frequency