A ringing alarm clock sits inside a glass bell jar. As air is pumped out, the ringing fades steadily until it disappears entirely.
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Per-prompt rubric
Basic standards
Visual presence
- an alarm clock
- a glass bell jar
- a pump
Event: an alarm clock rings inside a bell jar while air is pumped out
Audio presence
- an alarm clock
Sound: silence
Key standards
Visual physical commonsense (V-PC)
- An alarm clock with a standard 12-numeral face is visibly inside a sealed glass bell jar connected to an operating pump or pressure gauge.
- The clock's hands move normally and the alarm hammer visibly strikes the bells during the ringing phase.
Audio physical commonsense (A-PC)
- The alarm clock ringing is audible at the start of the clip and fades steadily in loudness as the pump operates, reaching near-silence by the end.
Cross-modal physical commonsense (AV-PC)
- The attenuation of the ringing in the audio aligns in time with the visible pump operation or pressure-gauge change.