← all videos

A person speaks normally. Then they put on a full-face motorcycle helmet and continue speaking, and the voice sounds boxy and muffled inside the helmet.

C3-3-14 Environment Transition · sound_attenuation principle: Low-Pass Filtering & Barrier Obstruction (Material)
Seedance 2.0ByteDance · proprietary
Kling 3.0 OmniKuaishou · proprietary
Veo 3.1Google · proprietary
LTX-2.3Lightricks · open
Ovi 1.1character.ai · open
JavisDiT++JavisDiT · open
MagiHumanGAIR-NLP · open
Per-prompt rubric

Basic standards

Visual presence

  • a person
  • a full-face motorcycle helmet

Event: a person puts on a full-face motorcycle helmet while speaking

Audio presence

  • a person

Sound: human speech

Key standards

Visual physical commonsense (V-PC)

  • A person speaks normally without a helmet at the start of the clip.
  • The same person then visibly puts on a full-face motorcycle helmet that covers the mouth, and continues speaking.

Audio physical commonsense (A-PC)

  • The first speech segment is clear and bright in timbre.
  • The second speech segment is audibly boxy with reduced high-frequency detail and added small-enclosure resonance.
  • The voice belongs to the same person speaking throughout both segments.

Cross-modal physical commonsense (AV-PC)

  • The timbral change in the voice aligns in time with the visible donning of the helmet such that the mouth is covered.