A single modern analog FM signal, which can reproduce frequencies to 15 kHz, requires about 200 kHz of bandwidth, the same space as 20 AM channels, or with modern spacing, about 5-8 AM radio stations.

Arceneaux, Ph.D., is a media studies professor at San Diego State University. He lives in San Carlos and is on Twitter, @noahax.I started studying radio in 2003 when I began a doctorate program in … ...

This vintage radio can play AM, FM, and MP3, all with a classic sound. Inside you’ll find a new AM radio tube-amp, providing the functionality you’d expect from the device. The rest of … ...

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.

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But altering the amplitude of an AM carrier messes with the data it’s trying to transmit, which is why AM radio typically has more static than FM does.

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 ...

The first generation of Corvettes was born in a time limited to AM radio. The only aftermarket audio enhancements available were a reverb box and a bulky automotive record player that only worked ...

For nearly 100 years, drivers have been listening to AM radio, an American institution crackling with news, traffic, weather, sports and an eclectic variety of other programs. But that dashboard ...

Most AM/FM radio listening is heard outside the home, with the automobile a common location. One-third of U.S. adults listen to AM radio each month, a large majority (74%) in the car.