They initially relied on computer modeling of the concert hall and its interior components However current computer simulation capabilities are imperfect and do not catch the behavior of sound wave dispersal at different frequencies After this stage Nagata then built a tenth scale model to assess the reverberation and reflection of the sound at different frequencies (see Figure 9-8-2) This facilitated better definition and quality of the sound reflection over the aural spectrum the acoustic designer also collaborated with the interior design team to ensure that the ceiling shape seating arrangement and materials fit the acoustical design and did not impact the acoustical performance The