Source (drag in Free mode)
Observer (drag anywhere)
Wavefronts at speed of sound
Mach cone when supersonic
Space pause
1-5 presets
A audio
R reset
T tour
SONIC BOOM
Step 1 of 5
Sound is a wave that travels at finite speed.
Watch the cyan rings — those are wavefronts crawling outward at the speed of sound (c). Right now the source is stationary, so the rings are evenly spaced and the observer hears the source frequency unchanged.