👉 The Hz (Hertz) is the unit of frequency, representing the number of cycles or oscillations per second in a wave. In simpler terms, it measures how many times a sound wave repeats itself in a second. For example, a tuning fork vibrates 440 Hz, meaning it completes 440 oscillations every second, producing the musical note A above middle C. This measurement is fundamental in acoustics, telecommunications, and signal processing, as it directly influences the pitch of sound and the bandwidth of signals. Higher frequencies (more Hz) correspond to higher pitches, while lower frequencies produce lower pitches. Understanding Hz is crucial for analyzing and manipulating sound waves in various applications.