Beat Frequency
This interactive simulator explores Beat Frequency in Waves & Sound. Two slightly different frequencies creating audible beats. Use the controls to change the scenario; watch the visualization and any graphs or readouts to connect the model with lectures, labs, and homework.
Who it's for: Best once you already know the basic definitions and want to build intuition. Typical context: Waves & Sound.
Key terms
- beat
- frequency
- beat frequency
- waves
- sound
How it works
When two tones are close in frequency, their superposition is a carrier at the average frequency modulated by a slowly varying amplitude. The loudness pulses at the beat frequency |f₁−f₂| — you hear ‘wah-wah’ beats. The canvas scrolls time; dashed lines show the envelope.
Key equations
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