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Unlicensed, government-authorized private radio solutions such as Citizens' band radio in Australia, most of the Americas, and Europe, and Loved ones Radio Service and Multi-Use Radio Service in North America exist to provide basic, normally brief variety communication for men and women and smaller groups, without having the overhead of licensing. Related services exist in other components of the planet. These radio services involve the use of handheld units.

AM radio utilizes amplitude modulation, in which the amplitude of the transmitted signal is created proportional to the sound amplitude captured (transduced) by the microphone, whilst the transmitted frequency remains unchanged. Transmissions are impacted by static and interference due to the fact lightning and other sources of radio emissions on the identical frequency add their amplitudes to the original transmitted amplitude.