★★★★☆

Sound insulation | Four stars

We award four stars to acoustic booths or room-in-room systems whose sound insulation values are in the 30 - 33 decibel range (so-called class A) and therefore achieve very good insulation values that exceed the normal requirements for office environments. Acoustic booths of this quality level are generally heavier, as more material is required to achieve the high level of insulation. More information at: Sound insulation.