khz
n. countablen. a unit for measuring how fast something vibrates or how high a sound is. One KHz is equal to one thousand cycles per second.
n. a unit of frequency equal to one thousand cycles per second. Used primarily in acoustics, electronics, and radio communications to measure signal frequency or sampling rates.
Human hearing usually goes up to about 20 KHz.
The technician adjusted the audio filter to cut out all frequencies above 15 KHz to reduce high-pitched background hiss.
While standard digital audio is often sampled at 44.1 KHz, high-resolution formats may use much higher rates to capture ultrasonic frequencies that lie beyond the range of human perception.
The abbreviation is typically written with a capital K and H, and a lowercase z, though 'kHz' is the standard SI form.