General Science Flash Card Set 819300

Card 1 of 10
Doppler Effect

The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a higher pitch and, when they're moving apart, the listener perceives the sound with a lower pitch.

higher, lower

The Doppler effect occurs when the source or listener (or both) of sound waves is moving. If they're moving closer together, the listener perceives the sound with a __________ pitch and, when they're moving apart, the listener perceives the sound with a __________ pitch.