Why does the voice change with Helium? - Extra Education

Why does the voice change with Helium?

When you inhale ambient air, your vocal cords vibrate in "normal" mode.

However, helium has a lower density, around 7 times lower than air. As a result, the vocal cords are less stained and vibrate at a higher frequency. The voice becomes higher and more squeaky.

And if you inhale a heavy gas, such as sulfur fluride, which is fice times heavier than air, even a 7 Year Old girl will start to speak in bass.

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Last Updated : Oct 30, 2021