Question

example of a doppler effect ​

Answer 1

The Doppler effect (or the Doppler shift) is the change in frequency of a wave in relation to an observer who is moving relative to the wave source. ... A common example of Doppler shift is the change of pitch heard when a vehicle sounding a horn approaches and recedes from an observer.

Answer 2

⭐ When a train is approaching us, we hear its whistle sound with higher pitch.