Discretion Bubble

A 10-foot-radius invisible and immobile dome springs into existence around and above you and remains stationary for the duration. The hemisphere includes a floor. The spell ends if you leave its area.

Nine creatures of Medium size or smaller can fit inside the dome with you. The spell fails if its area includes a larger creature or more than nine creatures. Any sound made from within the dome can only be heard by the creatures inside the dome, while sound coming from outside the dome can still be heard from within. 

The dome doesn't prevent spellcasting or offer any other protection.