Improve acoustics without the need to change existing installations such as ventilation, cables, lamps, etc. LÄTT is manufactured in two standard sizes. The absorbents are 50 mm thick for good sound absorption. The core material is Rockwool which is covered with Acoustic Nonwoven to eliminate fibre deposition. LÄTT is mounted in the ceiling leaving other installations such as lighting and ventilation undisturbed. LÄTT is delivered fully dressed in black or white Acoustic Nonwoven. The clamps are available in two models, with or without an air gap between the absorbent and the ceiling. Air gap is 50 mm.