The unit of measurement for frequency is the hertz (Hz). One hertz is defined as one cycle per second and is used to quantify the frequency of periodic events, such as sound waves, electromagnetic waves, and other oscillating systems. In audio applications, for example, the frequency of a sound wave affects its pitch; higher frequencies correspond to higher pitches, while lower frequencies correspond to lower pitches. The hertz scale is widely used in various scientific and engineering fields, including physics, music, telecommunications, and electronics, allowing for precise descriptions of oscillatory behaviors in numerous systems.