Thunderdome

A sudden loud thrumming noise, painfully intense, emits from you in a dome with a radius of 20 ft. for the duration. Outside the dome, a light thrumming can be heard for 100 ft.

Any creatures within the radius are pushed 5 ft away from you, and when the creature enters the area for the first time on a turn or each time it starts its turn there, it must make a Constitution throw saving throw.  On a failed save, the creature takes 4d8 thunder damage and is deafened for one round. On a successful save, the creature takes half as much damage and is not deafened. A creature made of inorganic material such as stone, crystal, or metal has disadvantage on this saving throw.

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 3rd.