Your vocal chords are tense during the inhalation
i think vocal chords work when the flaps of the vocal chords are pushed together to make a noise, then your mouth forms it into words.
helium is less dense than the normal air we breathe, so when you breathe helium out and your vocal chords vibrate, it comes out in a higher pitch tone.
Vocal Chords
Conure Parrots do not have vocal chords like a human. Conure Parrots have vocal folds in a structure called the syrinx, not in the laranyx like a humans does.
It just means don't stress your vocal chords, no yelling, screaming, or anything that might cause damage to your vocal chords.
with their vocal chords
British singer Adele had an operation on her vocal cords in 2011 due to a vocal cord hemorrhage.
Puberty. The longer your vocal cords get the deeper your voice.
Your vocal chords
vocal chords
larynx