Perforated panels are the most economical way to get an acoustic treatment with a high degree of absorption. With several variations of patterns and hole diameters, different levels of absorption and aesthetic results can be achieved.

Wall covering panels:
used plates are often 2400x1200, 2400x600 and 1200x60mm. 12mm thick.

Ceilings:
is usually more common to use 12mm thick plates in standardized measures of 1200x600, 1200x300 and 600x600, other combinations are also possible.