Technology: Radio Zaps The Static

AM and FM stations get a high-tech tune-up with the debut of HD radio

If static-plagued reception made you give up on radio years ago, this may be the year you tune back in. That's because dozens of AM and FM stations are starting to transmit digital broadcasts that promise crisper, clearer sound. The first HD (high definition) radio tuner goes on sale this month. It will be unveiled at this week's Consumer Electronics Show in Las Vegas, along with other models due this spring.

Digital broadcasts can produce better-quality audio because the tightly encoded ones and zeros that make up the signals are less susceptible to interference than are analog radio waves, which...

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