Type 13/3 acoustic wood planks are probably the most popular grooves panel convinces with good absorption performance. Groove in front of the panel is 3mm, the distance between each groove is 13mm. When perforation ratio is 12%, there are 4000holes/m² at the back of this mode and provides high acoustic absorption in mid frequency. When perforation ratio is 6%, there are 2000holes/m² at the back of the panel and provides high acoustic absorption in low and mid frequency with broad range.
Type 13/3 can be used in all areas like ceiling,wall and is basically universal product.