The NRC coefficient is subject to material thickness. 12 mm thus has a value of 0.45. Please see technical details below for further clarification of values.
Woodgrain Acoustic Wall and Ceiling WoodGrain slat its 3-Dimensional textures gives highly effective sound absorption surface, particularly mid-range, not only
Sàn Thể Thao
Phone Booth
Ghế Văn Phòng
