Small holes – big effect
Micro perforation, sound absorption and design
- hole diameter from 0.5 to 2 mm in a wide variety of plastics any breadboard
- e.g. is equivalent to 5×5 mm ~ 40,000 holes per square meter.
- material thicknesses of 3 – 15 mm
If holes smaller than 1 mm, a mass-spring system can be stimulated, which has to overcome in the holes so much viscous friction that no additional damping is needed.
For optimum results, the absorption area, material thickness, hole diameter and grid dimensions must be in the correct ratio.