Doppler Effect
Doppler 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