How does radio communication work? - FamousWhy
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How does radio communication work?

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How does radio communication work? Radio signals are transmitted using a carrier wave. A radio transmitter changes, or modulates, this radio wave in order to convey information. In AM radio the height of the carrier wave is altered according to the sound picked up by a microphone. In FM radio the frequency, or distance between the peaks in the radio wave, is changed.

The radio receiver picks up these signals and amplifies and decodes them. If the signal is weak, AM radio sounds crackly.

It is being replaced by FM radio, which gives much clearer reception and, increasingly, digital.

Tags: radio, signal

Category: Science & Tech  - ( Science & Tech Archive)

Date Added: 13 December '11

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