Personal Electronic Media Players
For many, personal audio electronic devices such as iPods and other MP3 Players play a pivotal role in our individual entertainment lives. Many of us couldn’t imagine a walk to work or treadmill jog without one.
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The air around you is bursting with radio waves -- and you can tap into them with minimal effort. With a simple radio scanner, all sorts of transmissions are within your earshot. Find out how radio scanners let you listen in on everything from police to astronaut transmissions.
By Gary Brown
AM radio, FM radio, CB radio, short wave radio, VHF, UHF -- what's it all mean? These are all different chunks of the radio spectrum. Find out all about the thousands of different uses for radio waves.