... , perforated acoustic board, groove acoustic panel,wooden Perforated Acoustic Panel 1.FeatureThis product is light ... , lecture hall, exhibition hall, the courts, multi-function hall, studio, auditorium, terminal, hospitals, schools, computer room, art galleries, ... )Back of board : Sound Fiberglass Mat3) surface finishing : Wooden Veneer, Melamine and Painting.4) Patterns: perforation, groove, square ...