Hertz (symbol: Hz) is a unit of frequency that measures the number of cycles per second of a repeating event. It is commonly used in various fields such as physics, engineering, and telecommunications to describe wave phenomena, including sound waves, electromagnetic waves, and other periodic signals. 1. **Usage in Frequency**: For example, a sound wave that has a frequency of 440 Hz completes 440 cycles (or oscillations) every second.
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Named after radio pioneer Heinrich Hertz.