Acoustical specifications (UCI)
lExternal walls   R’w = 55 dB
lInternal walls   R’w = 50 dB
lFire-resistant walls R’w = 55 dB
lWall between cinema rooms  R’w = 65 dB
lRoof  R’w = 50 dB
lFloor R’w = 60 dB
lInternal doors    R’w = 45 dB
lWall of the projection room R’w = 50 dB
Apparent Sound Reduction Index
(ISO-140/4, ISO-717)