Why does helium change your voice?
Show answer & explanation
Answer: Sound travels faster in helium
It makes you breathe faster — Wrong. Breathing rate doesn't cause the voice change. It's about how sound travels through the gas.
Sound travels faster in helium ✓ — Correct! Sound travels nearly 3 times faster in helium than in air. This changes the resonance in your throat and mouth, boosting higher frequencies. Your vocal cords work normally—only the sound quality changes!
Helium vibrates differently — Wrong. Helium molecules vibrate similarly to air. The effect comes from sound's different speed in helium.