Classification with fire according to the M1 standard.
Panels ST608-M1 are intended of advantage for the diffraction of the medium waves that for their diffusions. The relief in zigzag is especially intended to increase the surface of absorption. The installation spaced in line or quincunx of panels ST608-M1 on the back wall will reduce the stationary echoes, while preserving a minimum of reflexions useful for the establishment of the reverberated field.