Kilohertz (KHz) equals one thousand hertz (Hz). Frequency measures cycles per second in signals and waves. Higher KHz means more cycles per second
DMR is an international standard for two-way radios created by ETSI. Standard allows different manufacturers' equipment to work together. First ratified in 2005, updated in November 2018
Wave velocity is measured in meters per second. Wavelength is the distance between wave peaks, measured in meters. Frequency is measured in Hertz (Hz), indicating particle vibrations per second
Megahertz (MHz) equals one million hertz (10^6 Hz). Hertz is the standard unit of frequency in SI. Named after Heinrich Hertz, who discovered EM radiation
Frequency is the number of times an event has occurred in an experiment. Cumulative frequency is the total of absolute frequencies below a certain point. Relative frequency is absolute frequency normalized by total events
Pitch is the perceptual property that allows sounds to be ordered on a frequency scale. Pitch is not a purely objective physical property but a subjective psychoacoustical attribute. Pitch depends mainly on the speed of sound wave vibration, not amplitude