The Doppler effect is the change in frequency or pitch
{"Image DocumentName": "The Doppler effect is the change in frequency or pitch", "Image ImageDescription": "of the sound detected by. an observer because the sound. source and the observer have. different velocities with respect. to the medium of sound. propagation.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}