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Sound & Acoustics
Explore sound, vibration and hearing, connecting waves and acoustics to musical instruments, buildings and everyday experiences.
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Why Does Helium Change Your Voice?
Helium makes a voice sound unusually bright because sound travels much faster through helium than through air. That shifts the resonant frequencies of the mouth and throat—the formants that shape speech—upward. The vocal folds…
Oct 11, 2026 • 13 min readRead the discovery →LATEST
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