For K-12 Students · AM / FM Modulation
AM / FM Modulation for an EMI filter
Built for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework. Simulate an EMI filter live below — adjust the inputs and watch it respond, right in your browser.
AM / FM ModulationLive
how radio carries sound
Controls
Presets
Radio hides a low-frequency message inside a high-frequency carrier. AM varies the carrier's amplitude with the message; FM varies its frequency. FM resists noise better, which is why music stations use it. Educational tool.
Data Inspector
ModeAmplitude (AM)
Carrier / message20 / 2
Modulation index0.70
Modulation depth70%
Governing equation
Reading this result: AM varies the carrier's amplitude with the 2 Hz message at 70% depth. The envelope stays positive, so a simple envelope detector recovers the message cleanly. The 20 Hz carrier is far above the message so the two separate at the receiver.
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More with AM / FM Modulation
Frequently asked questions
- Is this good for k-12 students?
- Yes — this version of "AM / FM Modulation for an EMI filter" is framed for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework.
- Do I need to install anything?
- No. It runs in any modern browser, free, with no account required.