Waves & Oscillations · Branch 03

Sound

Why does a siren sound different as it passes?

6 scenarios · no order required
01
The Bell Jar
The air drains out. What happens to the alarm?
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02
Trackside
What does the pitch do as the car passes?
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03
The Boom
Three villages under the flight path. Who hears the boom?
Being rebuilt
04
The Beat
Two nearly-matched notes together: one steady tone, or a pulse?
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05
The Helium Voice
Breathe helium and squeak: did your vocal cords speed up, or something else?
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06
Same Note, Different Voice
A flute and a violin on the same note: same waveform, or different?
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The Field
No story, no script. All of this branch's physics, yours.
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