Høyfrekvens
Høyfrekvens refers to a range of electromagnetic waves with frequencies higher than those typically associated with audible sound and lower than infrared radiation. This frequency spectrum falls within the radio wave portion of the electromagnetic spectrum, specifically between approximately 3 megahertz (MHz) and 30 MHz.
The properties of high-frequency waves allow them to travel long distances. They can bounce off the ionosphere,
Historically, high-frequency radio played a vital role in international communication, maritime and aeronautical navigation, and military
The allocation and use of high-frequency bands are regulated internationally by organizations like the International Telecommunication