How noise-cancelling headphones actually cancel sound

• CRITICAL FIX BEFORE PUBLISH: '0.005ms after capture' is wrong by ~100x. Real ANC latency (mic capture → ADC → processing → DAC → driver) is roughly 0.3–1ms. Stating a precise false number with a tilde is worse than no number — informed viewers will catch it and it tanks credibility on an otherwise solid explainer.
• The s5 'warning/info' scene amplifies the error: calling out '~0.005ms — faster than any human perception' draws extra attention to the wrong figure.
• Physics is otherwise correct: 180° phase inversion, destructive interference, compression/rarefaction cancellation — all solid.
• 'The noise isn't blocked. It isn't absorbed. It stops existing.' is the standout line — terse, accurate, memorable. Strong finish.
• Before/after structure in s2 and s6 is well-engineered for this channel; the assumption/reality split earns its screen time.
• Mild overstatement: ANC works best on low-frequency, predictable noise (airplane hum, AC hum) and degrades on sudden or high-freq transients. Not fatal for short-form but a one-clause caveat would add credibility.
• CTA framing ('physics hiding in everyday objects') is a genuine identity builder, not a throwaway close.

Storyboard / 33s

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