Shortwave radio is a type of radio communication that uses high-frequency radio waves, typically between 3 and 30 megahertz. These waves can travel long distances by bouncing off the ionosphere, allowing broadcasts to be received far from their source. This makes shortwave radio popular for international broadcasting and emergency communications. Listeners can access a variety of programs, including news, music, and cultural content from around the world. Many countries, as well as organizations like Voice of America and BBC World Service, use shortwave radio to reach audiences in remote areas where other forms of communication may be limited.