Project PDA

Unit of measurement equal to a frequency of 1 million Hertz, that is, 1 million cycles per second. Processor speed refers to the speed in which a PDA manages its inner occupations. Processor speeds are considered in MHz (megahertz) and assortment among 4 MHz and 624 MHz. For common contact organization and selection setting purposes it is suggested to have a processor speed of as a minimum 16 MHz.

Electromagnetic radiation is often described by its frequency — the number of oscillations of the perpendicular electric and magnetic fields per second — expressed in hertz.

Radio frequency radiation is usually measured in kilohertz, megahertz, or gigahertz; this is why radio dials are commonly labelled with kHz, MHz, and GHz.

Sound is a travelling wave which is an oscillation of pressure. Humans perceive frequency of sound waves as pitch. Each musical note corresponds to a particular frequency which can be scientifically measured in hertz. Although the human ear is able to perceive frequencies ranging from 16 Hz to 20,000 Hz, the average human can hear sounds between 20 Hz and 16,000 Hz.

In computing, most CPUs are labeled in terms of their clock speed expressed in megahertz or gigahertz (109 hertz). The number of megahertz refers to the frequency of the CPU's master clock signal ("clock speed"). This signal is simply an electrical voltage which changes from low to high and back again at regular intervals.

Various computer buses, such as memory buses connecting the CPU and system RAM, also transfer data using clock signals operating at different frequencies in the megahertz ranges (for modern products).

The term is also used often in the context of aircraft radar transponders sending data to air traffic control facilities via a 1090 MHz transponder transmitter.