What unit of measurement is used to denote sound frequency?

The unit of measurement used to denote sound frequency is Hertz (Hz). Hertz measures the number of cycles per second of a sound wave, making it a fundamental unit in the field of acoustics and audio science. When discussing sound frequency, Hertz helps define how high or low a sound is perceived, with higher frequencies corresponding to higher pitch sounds and lower frequencies corresponding to lower pitch sounds.

While decibels (dB) relate to the intensity or loudness of sound rather than its frequency, kilohertz (kHz) is a unit that also measures frequency but is typically used to express values in a higher range (1 kHz equals 1,000 Hz). Amplitude refers to the strength or power of the sound wave but does not provide any information about the frequency itself. Thus, Hertz is the most basic and widely accepted unit for measuring sound frequency.