Have you ever left a concert or other loud event with some ringing in your ears? It is estimated that nearly 50 million Americans live with persistent ear ringing—better known as tinnitus. While there are some ways to reduce tinnitus-related distress, there is no cure. Rafay Khan, B.Sc., discusses what we know about tinnitus, what we would like to, the difficulties in studying it, and how we can help those who suffer from it.