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Discuss AM or FM within the Radio and Television forums, part of the BMM Paradise for Bachelors in Mass Media Forum category; AM means "amplitude modulation". The amplitude of the radio wave oscillates over time. The frequency of the radio wave is ...

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Sunanda K. Chavan
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sunandaC
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AM or FM - November 2nd, 2010

AM means "amplitude modulation". The amplitude of the radio wave oscillates over time. The frequency of the radio wave is constant. The peaks of the wave get taller and shorter. The rate at which the amplitude fluctuates corresponds to the pitch. How much it fluctuates corresponds to the volume.
FM means "frequency modulation". The amplitude of the radio wave is constant. The frequency varies a small amount. The peaks of the wave get closer together and further apart. The rate at which the frequency varies corresponds to the pitch. How much it varies corresponds to the volume.
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