Certified effectiveness

Certified effectiveness

With visually appealing, full-surface drilled holes - available in two sizes - we create the prerequisites for good sound absorption. The TÜV test report on the acoustic properties can be found under Downloads.

Our STEPWOOD® acoustic panels underwent laboratory acoustics and noise control tests at TÜV (Technical Inspection Authority) Rheinland. The sound absorption rating (αw) of STEPWOOD® panels in spruce and core beech with different drilled holes was measured. 
 
The test results are very satisfactory: e.g. Spruce panels with drilled holes R4.5 D2: high absorption (absorption class C): sound absorption rating (αw) = 0.75 
Core beech panels with drilled holes R4.5 D1.2: sound absorption rating (αw) = 0.40 with high sound absorption coefficient of > 0.8 in the frequency range of about 160-500 Hz