Hertz is an international measurement unit for the frequencies of a signal, abbreviated with Hz. It describes the rate of occurrence of a signal within a second. Therefore, 10 Hz equivalates to 10 signals or periods per second. The unit is named after the physicist Heinrich Hertz.
The unit Hertz is often used along the unit prefixes for thousand-fold increases, like Kilo, Mega, Giga and so forth. For example, the human hearing lies within a range of 16 Hertz to 16 Kilohertz, but this value can vary from person to person.