Inquiring Minds

Why Does Breathing Helium Make Your Voice So High? (1x3)

Air date: Sep 26, 1999

The discovery of how the density of several elements affects sound, what is needed for sound to be present, and how sound works. The pitch of a person's voice compared to that of a musical instrument is discussed, along with how changing the speed of sound affects the pitch of the voice, and how the pitch can be changed.