Why does your voice get higher when you inhale helium?



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Key Facts In This Video

  1. Sound is caused by vibrations traveling through the air. 00:26

  2. Helium's speed of sound is 3 times faster than the speed of sound in the atmosphere. 01:13

  3. Inhaling helium doesn't affect the volume or pitch of one's voice, only the timbre. 01:35

Written by Curiosity Staff November 24, 2014