Doppler Effect Wavelength Front Calculator

I want to calculate
Wave Velocity(v) = m/s
Source Velocity(us) = m/s
Source Frequency(f0) = Hz
Wavelength in Front of a Moving Source(λf) = m
 

The Doppler effect or shift is the change in frequency of a wave moving relative to its source.

The animation below shows the Doppler effect causes a siren to sound lower when it is receding than when it is approaching in pitch.

Doppler Effect Wavelength Front formula

Wavelength in Front of a Moving Source: λf＝(v-us) / f0

where f0 = Source Frequency, us = Source Velocity, v = Wave Velocity, λf = Wavelength in Front of a Moving Source.

For example, when Wave Velocity(v) = 10m/s, Source Velocity(us) = 2 m/s, Source Frequency(f0) = 55Hz, then Wavelength in Front of a Moving Source(λf) = 0.15m.

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