This area expresses a changing dqpb (dynamic phonic building). Visitors can move their hands and arms at the center of the exhibition room to operate the positions of the 3-D sound sources in real time. Inside the exhibition room corresponds to inside a virtual building that is basically ball-shaped and transforms into various shapes. The movable range of sound sources operated by a visitor is limited by the shape of the virtual building. Visitors can move their body referring to their auditory sensations and experience a quadruple phonic building that consists of 3-D + 1 (hour).