Concuss

You attempt to bend the gravity near the target’s head, sending out concussive waves. The target must make a constitution saving throw. On a failed save, the target is either silenced or deafened (your choice), and takes 2d6 bludgeoning damage. On a successful save, the target suffers no effects, and takes half damage. 

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, the damage increases by 1d6 for each slot level above 1st.