T1 can be used for effective sound scattering. In comparison to a solid fiat panel HAZA will be bénéficiai in preventing acoustical defects that may cause disturbance due to harsh sound reflections, acoustical glare, echo or flutter echo. The surface of HAZA panel with its convex waves is effective in diffusing the sound implying that its function is much différent from ab- sorbing panels. The panel can be arranged in an enclosed space to prevent formation of echoes supporting an even distribution of sound.