Kamal birthday. His girlfriend bought some Helium balloonsHelium is much lighter than air. Because of this, the speed of sound is much higher in helium. When you inhale helium you increase the speed of the sound of your voice. The shape of your vocal tract doesn't change. If you increase the speed of a sound you also increase the wavelength. However, on the way to the ear the sound travels thru air again and the wavelength goes back to normal. It's not the change in frequency that gives you the squeaky voice but a change in pitch. The sound has the same frequencies but helium causes a shift in your timbre. This means the higher frequencies are getting a higher enhancement than normal so the pitch changes. The end result? You sound like a chipmunk.
Read more: How Helium Works | Squeaky Voice | Effects & Dangers of Inhaling [ Ссылка ]
Amazing.
![](https://i.ytimg.com/vi/OBAs5Xb8KEs/mqdefault.jpg)