Aundair's Silent Sanctum

You surround yourself with an invisible bubble of energy in a 5-foot Emanation. The sphere muffles sound in both directions. Creatures outside of the Emanation have Disadvantage on Wisdom (Perception) checks made to hear any sounds from within the Emanation, and creatures inside the Emanation have Disadvantage on Wisdom (Perception) checks made to hear sounds outside of the Emanation.
In addition, creatures have Advantage on saving throws against effects that require them to hear a sound from the other side of the Emanation, such as the Command spell.