Creepy, Very Breathy voice. Doesn't speak often, mostly makes snarling, breathing sounds. However, when he does speak, he says it in a low, gravely tone. If you've ever seen The Grudge, The Forest, or most peoples interpretation of The Rake, that's the kind of voice/sound I'm going for with this creature. When speaking, it's not very clear, but you can still understand what it's saying.

for this role, I'll need someone who is able to yell, do pain and death sounds, etc, on top of voicing the character.

Lungs is an Urban-Legend in the US. He's mostly seen around Mines, Hospitals, Asylums, and Forests. Abandoned, Or not. Miners would complain about hearing noises in their workplace, and would refuse to go down due to it. Patients would complain about a figure at the side of their beds in the late, Late hours of the night, and early hours of the morning. It would whisper things to them. Encouraging them to do terrible things like Escape, abuse other patients, and just in general, to be a difficult patient. 

The last documented sight of this creature was in 1998, when Psychiatrist, Damien Harris, wrote about seeing him at his bedside at home. After writing about this event, Damien was never heard from, or seen again. A body was never found, it's almost as if he disappeared. The only thing that remained was his last writing about the creature.