Siuakustik Type 28/4 provides high acoustic absorption in low and mid frequencies. Groove distance is 4mm in front of the panel. The distance between each groove is 28mm. There are 2000holes/m² at the back of this model. The diameter of each hole is 10mm. Perforation ratio is 7.5% is an effective noise absorption element especially in the frequency range up to 500 Hz. The option of T-perforation enables a good flattened noise absorption over the entire frequency range from 125 to 4000 Hz. Therefore adequate for basically all frequency ranges.
Siuakustik Type 28/4 Panels can be installed by stapling to a timber batten or clamping to siuakustik Omega profile with clips.