Bose Corporation asked DCC to assist with the acoustical analysis for their new multi-purpose room at their corporate headquarters in Framingham, Massachusetts. The room had a circular design, and thus acoustical 'focusing' effects would likely arise. This phenomenon can occur when curved room surfaces reflect sound to a single point; thus a build-up of sound energy can occur at such focal points.
DCC recommended acoustical absorption treatments around the perimeter walls with a deep airspace behind the treatment. DCC performed an analysis to determine the low-frequency performance of wall treatments as a function of treatment and airspace depth. Amplified sound and performances were envisioned for this room and thus sound isolation to adjacent spaces was also considered in the design.
Figure 2 shows reflection analysis (impulse response) results for this circular room.
Figure 2. Room Reflection Analysis