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The speed of sound varies with the density of whatever it travels through. Something less dense than air means a faster relative speed of sound, something more dense means a slower relative speed of sound.
The slower sound moves, the lower we perceive it's pitch, the faster the speed, the higher the perceived pitch.
Vocal chords stretch and tighten to make sounds of different pitches. If you replace the air (Nitrogen-Oxygen mix) with something LESS dense like Helium (1/6th the density of air) then the sounds made by the vocal chords working exactly the same as they did in air, will have a higher apparent pitch because the sonds they make move faster through helium than they do through air. Please note, the vocal chords are NOT moving any faster than they do in air.
So with something more dense than air (like xenon about 4 times more dense, or even better Sulfur Hexafluoride about 16 times more dense than air and 40% more dense than water!) the sound will have an apparently lower pitch, because the sound made by the vocal chords will move more slowly through the denser gas and so have a LOWER perceived pitch.
What else can I help you with?
What is the gas that makes up 21 of earth's atmosphere?
The gas that makes up 21% of Earth's atmosphere is oxygen.
What gas makes up about 80 percent of the air on earth?
Nitrogen makes up about 79% of the atmosphere.
What type of weather makes pond water deeper?
Rainfall can increase the water level of a pond, making it deeper. Heavy and prolonged rainfall can lead to runoff, which can fill up the pond quickly.
What is the gas that makes up the majority of our atmosphere?
Nitrogen is the gas that makes up the majority of Earth's atmosphere, comprising about 78% of the air we breathe.
What gas makes up the largest percentage of Earth's atmosphere?
What gas makes up the majority of the Earth's atmosphere
What gas makes your voice squeaky?
Helium is the only gas that makes your voice squeaky.
What type of gas can make your voice deeper?
Anti-Helium as far as I know. Why do you ask? Is it because you're Justin Bieber and really NEED a deeper voice? Or some other odd reason?
What age does your voice get deeper?
It depends. My voice got deeper when I was 12.
What gas makes your voice go high?
Helium
Why is Sophia bush's voice different deeper now?
Sophia Bush's voice was deeper due to her naturally raspy voice and her health. During the seasons where she had a deeper voice, she claimed that she was ill.
What gas makes your voice go deep?
Sulfur hexafluoride.
Which is the lightest inert gas which makes your voice squeaky?
Helium
Why does Kenny has a dark voice when he is in south park?
When he's Mysterion, he makes his voice raspy and deeper on purpose. However, the reason why his voice is different in the episodes and the movie is caused by him having two different voice actors.
Why is my voice deeper in the morning?
Your voice is deeper in the morning because the vocal cords swell and thicken while you sleep, making them vibrate at a lower frequency, resulting in a deeper voice.
Does any gases make your voice deeper?
Inhaling sulfur hexafluoride gas temporarily changes the resonance in the vocal tract, making the voice sound deeper. However, this should only be done under controlled conditions as inhaling certain gases can be harmful.
Can smoking make your voice sound deeper?
Yes it can. the reason why is because you can get lung cancer. your voice will sound deeper
Why is the voice deeper in the morning?
The voice is deeper in the morning because the vocal cords swell and thicken overnight, making them vibrate at a lower frequency, resulting in a deeper sound.
