Question

what is pitch of sound

Answer 1

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Pitch of sound is that characteristic of sound by which an acute or shrill note can be distinguished from a grave or a flat note. If a pitch is higher, the sound is said to be shrill and if the pitch is low, the sound is flat.This is usually expressed as the number of Hz.

Answer 2

Pitch is a perceptual property of sounds that allows their ordering on a frequency-related scale, or more commonly, pitch is the quality that makes it possible to judge sounds as "higher" and "lower" in the sense associated with musical melodies