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Doppler effect

Last modified by
on
Jun 10, 2022, 4:08:53 PM
Created by
on
Jul 9, 2014, 2:36:22 PM
`f_0 = ((v+-v_0)/(v+-v_s))f`
`(v)" Speed of Sound Waves"`
`(v_0)" Observer Velocity"`
`(v_s)" Source Velocity"`
`(f_s)" Source Frequency of Sound Waves"`
Tags
Physics velocity wave Sound Frequency
UUID
65fc797d-0776-11e4-b7aa-bc764e2038f2

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
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