1초에 한 번의 주기가 반복되는 것을 나타내는 주파수의 단위.
The SI unit of frequency, equal to one cycle per second.
예문:
"The human hearing range is typically between 20 Hz and 20,000 Hz."
"Most modern computer monitors support a refresh rate of at least 60 Hz."
"The tuning fork vibrates at exactly 440 Hz, which is the standard pitch for A4."