Clarion Call

An ear-shattered bugle erupts in front of and away from you. Each creature in a 30-foot cone must make a Constitution saving throw. A creature takes 6d8 thunder damage on a failed save, or half as much damage on a successful one. Additionally, if a creature fails its saving throw by 5 or more, it is also deafened for 1 minute. 

The bugle can be clearly heard up to 1000 ft away.

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.