You unleash a thunderous wave in a 15ft radius sphere surrounding you. All creatures in the sphere must make a Constitution saving throw. On a failed save, that creature takes 3d8 Thunder damage and is pushed back 5ft away from the center of the sphere, and is knocked prone. On a successful save, the creature takes half as much damage and isn't pushed or knocked prone.

In addition, unsecured objects that are completely within the area of effect are automatically pushed 5ft feet away from you by the spell's effect, and the spell emits a thunderous boom audible out to 300 feet.

At Higher Levels. When you cast this spell using a spell slot of 4th level or higher, the damage increases by 1d8 for each slot level above 2nd.