WHAT'S INSIDE: PERSONAL AUDIO
- MP3 Players
Have you ever noticed a difference in the quality of radio signals depending on the time of day? Why do you hear some radio stations better at night than in the day?
Radio is the fundamental technology behind TV, cordless phones, cell phones and microwave ovens, for a start. Just about anywhere you go, radio wave transmissions are passing above you, around you, and even through you!