Doppler effect Upper secondary · Waves & Sound university bridge
Signal Chase
Move a sound beacon to tune the frequency reaching a stationary receiver.
Your arcade progress
0 XPXP, best stars and unlocked challenges stay saved in this browser.
Challenge 1 of 3
Approach the receiver
An air beacon emits 500 Hz. Its receiver needs a higher frequency.
Challenge cleared. Continue to unlock the next experiment.Handles also support arrow keys; the sliders offer the same controls.
Tune the received signal into 590–610 Hz.
Build your setup
Test 1Restoring your saved experiment…
3 stars on your first test; 2 within three; 1 after that. A first clear earns 100 XP plus 10 per star. Better star records earn the difference; repeating a record earns no extra XP.
Your experiment is ready.
Use the signed velocity of a moving sound source to produce a target received frequency in air and water.
0 of 3 challenges cleared · Best stars, unlocked rounds and your experiment are saved in this browser.
From the course to the controls
The physics behind the game
Use the signed velocity of a moving sound source to produce a target received frequency in air and water.
fᵣ = fₛc / (c − vₛ); vₛ > 0 towards the stationary receiver
Model assumptions. The receiver and medium are stationary; the source moves along their shared line. The source remains subsonic and the wave speed is fixed. This is the classical sound-source Doppler model, not a relativistic light-frequency model.