Acoustic optimisation of the offices at Lange Uhren GmbH (Lange & Söhne) in the BACKFABRIK in Berlin.

Acoustic absorber material used for the ceiling surfaces:

• Basotect® Melamine resin acoustic foam, porous. (L/B/H:100x50x5 cm) white, flat (no bending). Melamine resin is highly UV-resistant, lightfast and does not yellow.
• Sound absorption: 100% of the frequencies from 350Hz – 2500Hz (corresponds to office noise range).
• Fire retardant according to DIN1402 B1 (flame retardant)
• Funktion: Sound waves get entangled in the fine porous pores and are converted into heat by friction.

Result:
Reverberation time in open-plan offices (ceiling height: 5 metres) reduced from 1.5 seconds to 0.4 seconds (standard setting for reverberation time in German offices is 0.7 seconds)