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A small scooter idles with a quiet buzz. The scene cuts to a large truck idling with a deep loud rumble.

C2-2-18 Event Transition · source_excitation principle: Sound Source Power Comparison (Mechanics)
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Per-prompt rubric

Basic standards

Visual presence

  • a scooter
  • a truck

Event: a scooter and a truck idle

Audio presence

  • a scooter engine
  • a truck engine

Sound: a vehicle idling

Key standards

Visual physical commonsense (V-PC)

  • The clip shows both a small scooter or motorcycle and, after a scene cut, a large truck.

Audio physical commonsense (A-PC)

  • The truck's idling rumble is noticeably louder and lower in frequency than the scooter's quiet buzz.
  • Both vehicles produce clear idling engine sounds throughout their respective scenes.

Cross-modal physical commonsense (AV-PC)

  • The quieter higher-pitched buzz aligns with the scooter scene.
  • The louder deeper rumble aligns with the truck scene.