FM radio works the same way that AM radio works. The difference is in how the carrier wave is modulated, or altered. With AM radio, the amplitude, or overall strength, of the signal is varied to ...

Below is a list of all the BBC's radio services that are available on FM and AM. We have listed the frequency ranges, if you want to know the exact frequency for your location then use our ...

Roosevelt's fireside chats. When did FM radio become more popular than AM radio? "FM" broadcasting, invented in the early 1930s, uses frequency modulation, offering better sound quality than AM.