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Inside a moving car, one window is cracked open a few centimeters. As the car speeds up, a Helmholtz wind throb fills the cabin with a deep rhythmic wub-wub thumping.

C2-3-25 Event Transition · source_radiation principle: Helmholtz Resonance (Mechanics)
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Per-prompt rubric

Basic standards

Visual presence

  • a car cabin
  • a cracked window

Event: a moving car has one window cracked open a few centimeters

Audio presence

  • a car cabin

Sound: Helmholtz wind throb

Key standards

Visual physical commonsense (V-PC)

  • A regular car cabin side window is visibly open by a small gap of a few centimeters.
  • The car visibly accelerates with continuous motion through the clip.

Audio physical commonsense (A-PC)

  • A deep low-frequency rhythmic wub-wub Helmholtz throb is audible inside the cabin.
  • The throb intensifies as the car speeds up.

Cross-modal physical commonsense (AV-PC)

  • The throb intensifies in correspondence with the visible acceleration of the car.