Thunderous shock

A powerfull shock wave flashes from one of harp strings in a point you choose within range and then blossoms with a thunderous roar. Each creature in a 20-foot-radius sphere centered on that point must make a Dexterity saving throw. A target takes 8d6 thunder damage on a failed save and become deafened until the next turn, or half as much damage on a successful one. 

The explosion can eject the items that aren't being worn or carried.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d6 for each slot level above 3rd.