Doppler effect

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 Math / Science

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.

References:

Light and Matter Chapter 19.5: The Doppler Effect