Doppler Effect

Written by Jerry Ratzlaff on . Posted in Classical Mechanics

doppler effect 1Doppler effect, abbreviated as \(f_o\), is the increase (or decrease) in the frequency of sound, light, or other waves as the source and observer move toward (or away) each other.

 

Doppler effect formula

\(\large{ f_o = \frac{ v \;+\; v_o  }{ v \;+\; v_s  } \; f_s  }\) 

Where:

 Units English Metric
\(\large{ f_o }\) = observer frequency \(\large{ Hz }\)  \(\large{ Hz }\) 
\(\large{ v }\) = speed of sound waves \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ v_o }\) = velocity of observer \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ v_s }\) = velocity of source \(\large{\frac{ft}{sec}}\) \(\large{\frac{m}{s}}\)
\(\large{ f_s }\) = actual frequency of sound waves \(\large{ Hz }\)  \(\large{ Hz }\) 

 

 

Tags: Equations for Speed