perforated gypsum ceiling tiles

Perforated gypsum ceiling scanner ♦ square hole perforation type:square type,3*3mm,5*5mm,10*10mm,12*12mmsize 2440*1220*12.5mm,610*610*12.5mm,1220*610*12.5mm,other on requestcolor of non-woven fabric:white ,black , blue , other on requestperforation rate:13.4%-17.2%NRC rate:0.7RH70 ♦ Circle Hole Perforating type : circle hole,Φ6mm (pitch:18mm),Φ8mm (pitch:25mm),Φ12mm (pitch:25mm),Φ15mm (pitch:30mm) ♦ Size:2440*1220*9.5mm,2440*610*9.5mm,other on request. ♦ Color of non-woven fabric,white ,black .blue ,other on request ♦ Perforation rate:8.7%-19.6% ♦ NRC rate:0.7 ♦ RH70 ♦ Irregular Circle Hole Perforating type : irregular circle hole,Φ6/10, Φ12/20, Φ35/20/12, Φ20/12/8Size:2440*1220*12.5mm, other on request.Color of non-woven fabric, white ,black .blue ,other on requestPerforation rate:8.7%-18.1%NRC rate:0.7RH70♦ Other Surface PVC laminated acoustic perforated gypsum board.Many patterns can be chose.♦ Installation Ceiling:like ordinary gypsum board, roller coated surface.Partion: like ordinary gypsum board, roller coated surface.♦ ABOUT US Huilong acoustic perforated gypsum board is designed on the basis of helholtz resonance theorem,After perforated, the holes,board and the wall make up of many resonant cavities,when air molecules pass the holes,the resonnt cavities will consume large quantities of sound energy. Huilong acoustic perforated gypsum board is one of the best sound absorption products,it ie widely used in office ,cinema,church,hospital.school and so on.