Doppler Effect Approaching Source

Description

Doppler Effect is the change in frequency and wavelength of a wave for an observer moving relative to the source of the waves.Compared to the emitted frequency, the received frequency is higher during the approach, identical at the instant of passing by, and lower during the recession. if the source of waves is moving away from the observer, each wave is emitted from a position farther from the observer than the previous wave, so the arrival time between successive waves is increased, reducing the frequency. The distance between successive wave fronts is then increased, so the waves “spread out”. Here we can calculate the new frequency of an approaching Source.

Related formulas

Variables

f'New Frequency of Approaching Source (Hz)
vWave Velocity (m/s)
λWavelength in Front of Source (m)