Definitely doable. I'm sure she could emit a painfully loud, but not eardrum-rupturing, noise at an uncomfortably high pitch. If you had sudden blasts of noise like that, at random and unpredictable intervals, that would be awful. It would be the auditory equivalent of Chinese water torture. 

Rayne is iffy with torture, though. She knows from experience the sort of pain she's inflicting, which would make her incredibly empathetic. She won't torture a person unless it's absolutely justified.