1. Why does the inhalation of helium make your voice high-pitched?

Answer 1

Because helium alone is less dense than atmospheric air, it will change the timbre (not pitch) of a person's voice when inhaled. However, inhaling it from a typical commercial source, such as that used to fill balloons, can be dangerous due to the number of contaminants that may be present. These could include trace amount of other gases, in addition to aerosolized lubricating oil.

The voice of a person who has inhaled helium temporarily sounds high-pitched. This is because the speed of sound in helium is nearly three times greater than in air. Because the fundamental frequency of a gas-filled cavity is proportional to the speed of sound in the gas, when helium is inhaled there is a corresponding increase in the resonant frequencies of the vocal tract. (The opposite effect, lowering frequencies, can be obtained by inhaling sulfur hexafluoride) (THIS INFO IS FROM WIKIPEDIA IF YOU WANNA RESEARCH MORE)

Hope that helps

Answer 2

When you speak, the sound is transmitted by vibrating the particles in the air until it reaches the ear. Once there its turned into the noises we've come to understand. Hence why sound doesnt travel in a vacuum, there is nothing there to carry the vibrations. When you inhale helium and speak, the vibrations become faster, and thus higher pitched since helium's density is lower than air. If you took in denser than air chemicals, the vibrations would be slower and would sound lower. For safety, helium, being less dense then air, can escape your lungs easily. So inhaling a party balloon to raise your voice for a few seconds won't cause any permanent harm. However extended breathing of helium would be bad since you would not get sufficient oxygen in your body, and would asphyxiate. The denser gases, which in most cases are only available in science labs, are much more dangerous and should NEVER be done for a multitude of factors, all of which would lead to serious side effects or death.

Answer 3

The voice of a person who has inhaled helium temporarily sounds high-pitched. This is because the speed of sound in helium is nearly three times greater than in air. Because the fundamental frequency of a gas-filled cavity is proportional to the speed of sound in the gas, when helium is inhaled there is a corresponding increase in the resonant frequencies of the vocal tract

Answer 4

Helium, being a gas of low density, our vocal chords can vibrate in it at a high frequency.

Answer 5

doesn't it constrict your vocal chords? i can't remember but something like that lol