Like to consult, generally perforated aluminum is much to do sound-absorbing wall punching? The opening rate is? 
 Hebei Wang Metal Mesh Co., Ltd. to answer your questions related issues 

 Perforated aluminum used to make wall panels or wall sound-absorbing panels in general red 3mm hole 2mm spacing, and also some 5 mm hole 3 mm spacing according to the thickness difference to determine the size of the punching, under normal circumstances open The porosity is 30%. 
 Hebei Wang Metal Mesh Co., Ltd. is a high quality manufacturer of perforated aluminum, aluminum perforated acoustic panels, we are a manufacturer of perforated aluminum spray pressure manufacturer of custom perforated aluminum, in full accordance with the needs of customers, including the aluminum models, the pore size and the color of the spray, with a fluorocarbon coating manufacturers we have recently established a cooperative relationship, so if you need a fluorocarbon coating the surface treatment, we can also custom-made. 
 Perforated aluminum Pass: round hole, square hole, a long hole, hexagonal hole 
 Perforated aluminum sheet Aperture Size: usually 3 holes from the two, from the five hole] 
 Perforated aluminum sheet thickness :0.4-8mm, and can be customized special 
 Perforated aluminum sheet size: 1000 * 2000,1250 * 2500,1200 * 2400,1000 * 1000,600 * 600, etc. 
 For you to choose a variety of spray color, generally white, gray, white, gray, silver gray, black,