The vaulted cellar of the "Ziegelhüsi" restaurant in Deisswil near Stettlen BE is a jewel. It is widely used both at lunchtime for a business lunch and in the evening for a tasteful candlelight dinner. However, the guests repeatedly complained about the acoustics and that calm and relaxed communication was unfortunately not possible. Bernapark AG, as the owner of the restaurant, then decided to remedy this situation and take action. In the course of the acoustic renovation, various other renovations were also carried out, which we were able to both propose and plan. In the end, it turned out to be a successful project that not only upgraded the room acoustically but also optically.