๐จ Doppler Effect Calculator
Uses the speed of sound at 343 m/s (20ยฐC air). Enter velocities as positive when moving toward the other party.
Observed frequency767.09 Hz
Enter a sound sourceโs frequency along with the observerโs and sourceโs velocities to calculate the observed frequency using the standard Doppler effect formula. This models the effect where a siren sounds higher-pitched as it approaches and lower-pitched as it moves away.
How to use
- Enter the source frequency (Hz).
- Enter the observerโs velocity (positive when moving toward the source).
- Enter the sourceโs velocity (positive when moving toward the observer).
- The observed frequency is calculated automatically.
FAQ
What formula does this use?
It uses the standard Doppler effect formula f' = f ร (v + observer velocity) / (v - source velocity), where v is the speed of sound.
What speed of sound does this use?
It uses the standard value for the speed of sound in air at 20ยฐC: 343 meters per second.
What happens if the source moves faster than the speed of sound?
This tool only supports subsonic source speeds. Above the speed of sound the formula breaks down, so no result is shown.