Effect on Soundwaves Emitted From a Moving Source
This page is the CodyCross answer for the clue below from Past and Present Tech, Group 1456, Puzzle 1 (Pinball Machine).
Question is: Effect on Soundwaves Emitted From a Moving Source
and the answer is: DOPPLER
Word Meaning:
DOPPLER — (medicine, by ellipsis, informal) Ellipsis of Doppler ultrasonography: Any of various types of ultrasonography that use the Doppler effect; especially, medical versions thereof.
Definitions from Wiktionary.