The Eavesdropper (2004)

What you hear can kill you.

Fifteen deaf patients took part in an experimental clinical trail aimed at hearing restoration. Within days, fourteen of the fifteen participants in the trial become violently psychotic, ultimately taking their lives to stop violent side effects brought on by the treatment. This is the story of the sole survivor of the experiment, Patient #14 - Liza Raines, who participation in the experiment gave her super-normal hearing abilities - particularly, the ability to hear the frequency emitted by the brain when it thinks. When her life is suddenly thrown into jeopardy, Liza is forced to use her ability against those set on covering up the fact that she even existed