You are Thomas Alva Edison. You also invented the phonograph
and the first practical movie camera. Sadly, you died almost exactly
9 years before I was born.
The other name is displacement vessels
(not sure tho)
Hello There
Answer: The Doppler effect
Reason: The Doppler effect is an increase or decrease in the frequency of sound, light, or waves as the source and observer move to each other. An example would be a firetruck with its siren on driving away from you.
I hope this helps
-Chris