What property of noise refers to its pitch?

The property of noise that refers to its pitch is frequency. Pitch is a perceptual characteristic that allows us to differentiate between sounds that are high or low; this differentiation is determined by the frequency of the sound wave. Frequency, measured in hertz (Hz), indicates how many cycles per second the sound wave completes. Higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches.

Understanding this concept is crucial in fields such as acoustics, music, and sound engineering, as it helps in analyzing how different sounds interact and how they are perceived by the human ear.