Concussive Chord

You release a blast of sound with your voice (verbal component) or your instrument (somatic component).

Make a ranged spell attack against a creature within range. On a hit the creature takes 1d8 thunder damage and must succeed on a Constitution saving throw or be deafened until the start of your next turn.

This spell's damage increases by 1d8 when you reach 5th level (2d8), 11th (3d8), and 17th (4d8).