Why does helium make our voice go funny
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Answer:
The sound of your normal voice is determined by a number of factors. In addition to the air you breathe, the shape of your mouth, throat, nasal passages, tongue, and lips all contribute to creating the unique sound that is your voice.
Your voice begins in your voice box, which scientists call the larynx. Your larynx contains your vocal cords. These two folded mucous membranes vibrate when air passes between them. These vibrations resonate throughout your throat, nasal passages, mouth, tongue, and lips to create the sounds you make when you speak.
The air you breathe is made up mainly of nitrogen and oxygen. Helium is much less dense than regular air. That's why helium is used in balloons to make them float.Due to its lower density, sound travels over twice as fast through helium than it does regular air. When you breathe in helium, your voice travels much more quickly across your vocal cords. This results in the funny sounds you make when you talk after breathing helium.
Some people think that the helium changes the pitch of your voice. In reality, however, your vocal cords vibrate at the same frequency. The helium actually affects the sound quality of your voice (its tone or timbre) by allowing sound to travel faster and thus change the resonances of your vocal tract by making it more responsive to high-frequency sounds.
Helium is the second most abundant element in the known universe (hydrogen is the most abundant). Inhaling a couple of breaths of helium is usually harmless. Breathing a lot of helium, however, can be dangerous.
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