Acoustic Bubble

You target a point within range and shield a 10-foot-radius sphere centered on that point from sound. The bubble prevents sounds of moderate volume from passing in or out of its border, but does not suppress sounds inside of it. The bubble is completely invisible, but a creature can notice when it enters or exits its area of effect. Creatures are resistant to any thunder damage originating from the side of the bubble opposite them.

Sounds amplified by the spells amplify or thaumaturgy can still be heard from either side of the bubble, but creatures have a -10 penalty to Wisdom (Perception) checks to hear them. Additionally, creatures have a -5 penalty to Wisdom (Perception) checks to hear the knock spell from either side of the bubble.

At Higher Levels. When you cast this spell using a spell slot of 2nd-level or higher, the radius of the sphere increases by 5 feet, and the skill check penalties decrease by -1, for each slot level above 1st.