Does anyone know what it's called when people are singing and they make that guttural noise?

ok so everyone i know can make this noise, and i dont actually know if its guttural, but its this noise that people can make when theyre singing and in Tangled, Mother Gothel made the noise when she was singing mother knows best and so was like "mothAHHHHHHHHH" and yeah, if anyone knows what im talking about and knows tha name for that, thank you so much!!!! :D oh and haley from american idol made the noise every two seconds! and people do it when theyre talking to, and yelling and yeah, thanks!!