Dampening Ward

You trace a small runic sigil upon a surface. This sigil consumes any sound that it encounters within 10 square feet of the sigil until it is overloaded or after it loses its magical charge  (duration 12 hours) (whereupon it can be recharged using one action and one spell slot.) Upon being placed on a surface such as a wall, no sound can carry past that surface. The rune can widthstand up to 150 decibels of sound at a time.

When cast at higher levels, the spell can widthstand 10 extra decibels per spellcasting level.