Processing...

`f_0 = ((v+-v_0)/(v+-v_s))f`

Enter a value for all fields

The **Doppler Effect** equation computes the frequency that is observed by someone by using the velocity of the sound waves(`v`), the observers velocity(`v_0`), the source velocity(`v_s`) and the source frequency(`f_s`).

**INSTRUCTIONS:** Enter the following:

- (`v`) Velocity of Sound Waves
- (`v_0`) Observers Velocity
- (`v_s`) Source Velocity
- (`f_s`) Source Frequency

**Observers Frequency**(`f_s`): The equation returns the frequency in Hertz(**Hz**) . However, this can be automatically converted to other force units via the pull-down menu.

The Doppler Effect equation is used when you want to compute the frequency of what you would hear compared to the actual frequency of a moving vehicle. A good example to look at is an ambulance. In this scenario, the ambulance may be 1500 meters away so the frequency it outputs is a little different than what you hear due to velocity changes relative to your motion, the ambulances motion and the speed of sound.