what element makes your voice deeper
Sulfur hexafluoride (SF6) is an inert gas which is six times heavier than the air we breathe, and helium is six times lighter, so sulfur hexafluoride has the opposite effect as helium in being able to make your voice deeper.
Androgen's such as Testosterone not only give a boy a deeper voice but sets him up for sexual reproduction too.   Testosterone is the male hormone that begins to spread around the body during puberty in a boy. Besides a deep voice it brings pubic hair and growth to the penis, testicles, arms, legs, feet, hands. You name it ! + 14 others found this useful.