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A person drops a marble onto a hardwood floor. The impact is heard clearly by a person in the room below through the solid floor.

C1-3-14 Steady State · sound_persistence principle: Solid as Medium (Fluid)
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Per-prompt rubric

Basic standards

Visual presence

  • a marble
  • a hardwood floor
  • two people

Event: a marble is dropped onto a hardwood floor with a listener in the room below

Audio presence

  • a marble
  • a hardwood floor

Sound: marble impact transmitted through floor

Key standards

Visual physical commonsense (V-PC)

  • A marble is dropped onto an upstairs hardwood floor, and a separate downstairs room with a listener is also visible.
  • The upstairs and downstairs rooms have geometrically plausible floor heights, and the marble stays within the upstairs room.

Audio physical commonsense (A-PC)

  • The sound heard downstairs is a conducted marble-on-hardwood thud, plausibly attenuated through the floor.

Cross-modal physical commonsense (AV-PC)

  • The downstairs impact sound onsets at the moment the marble visibly strikes the upstairs floor.