Best of Celebrities on Sulfur Hexafluoride talk with Anti-Chipmunk's voice: Jennifer Lawrence, Lucy Liu, Jimmy Fallon, Donald Trump, Adam Savage 'MythBusters', Will Ferrell, Kelly Ripa, Michael Strahan, Kevin Delaney Funny Videos Compilation Inhaling a small volume temporarily changes the timbre and quality of the human voice. For entertainment purposes, when breathed, Sulfur Hexafluoride causes the voice to become significantly deeper, due to its density being so much higher than air. This is related to the more well-known effect of breathing low-density helium, which causes someone's voice to become much higher. Both of these effects should only be attempted with caution as these gases displace oxygen that the lungs are attempting to extract from the air. As with all gases, the density of Sulfur Hexafluoride affects the resonance frequencies of the vocal tract, thus changing drastically the vocal sound qualities, or timbre, of those who inhale it. It does not affect the vibrations of the vocal folds. The density of sulfur hexafluoride is relatively high at room temperature and pressure due to the gas's large molar mass. Unlike helium, which has a molar mass of about 4 grams/mol and gives the voice a childish and a "chipmunk like" quality, Sulfur Hexafluoride has a molar mass of about 146 g/mol, and the speed of sound through the gas is about 134 m/s at room temperature, giving the voice a "demonic" quality when Sulfur Hexafluoride is inhaled. Элегаз (гексафторид серы, шестифтористая сера) меняет голос известных актёров и певцов. При вдыхании наблюдается эффект пониженной тональности голоса, противоположный действию гелия.