Kilohertz

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The hertz is equivalent to cycles per second. Kilohertz, or a kHz, is a measurement of frequency equivalent to 1,000 hertz.

Kilohertz is unit of measurement for audio signals, alternating current, and a measurement of wireless signals.

The frequencies of sound waves, since the audible spectrum of sound frequencies is between 20 Hz and 20 KHz are measured in kilohertz. For example, middle C (C4) on a piano keyboard produces a frequency of 261.63 Hz.

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The hard disk was invented on September 13, 1956 by IBM team led by Rey Johnson (considered as “father” of the disk drive). Earlier hard disk drives were large and cumbersome devices.