Science of Technology: Modulation

The "M" in AM and FM stands for "modulation". Modulation is a process that changes (or modulates) one wave with details from another wave. The results for Amplitude Modulation ("AM") are shown below. You will see how different stations could play the same sounds, and how the same station can play different sounds!

Signal Frequency

Carrier Frequency

(Choose a Station)

Amplitude Modulated

AM Radio

Frequency Modulated

FM Radio

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