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hertz or cycle/second. The SI derived unit for frequency is the hertz. 1 hertz is equal to 1 cycle/second. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between hertz and cycles/second.
The number of cycles per second (Hertz) (abbreviated as, hz) of anything that oscillates is called the frequency. The electricity of an AC wall outlet is said to have a frequency of 60 Hertz as it cycles negative then positive 60 times each second. Sound is an oscillating wave, but it has a broad range of frequencies. A low frequency sound (say, 50 hz) might sound like a low rumble, while a high frequency sound (say 12,000 hz), might sound more like a sizzle. A person with normal hearing can hear all the way up to about 20,000 hz.