Noba digi

Acoustic parameters

for roads according to ČSN EN 1793:
sound absorbtion: category A3 – 8 dB
airborne sound insulation: category B3 – 26 dB

for railways according to ČSN EN 16272-3-1:
sound absorbtion: DL 9 dB
air sound insulation: DLR 27 dB