Test: NIC is a method for rating a partition's
ability to block airborne noise transfer.
Related Code: UBC/IBC and STC
General Information: Similar to a field STC test, NIC is
often specified on certain projects (such as spaces with operable
walls, hotels, education facilities). For a field STC test, the
individual transmission loss measurements are modified based on
the reverberation time, the size of the room and the size of the
test partition. The NIC does not include these modifications and
simply measures he Transmission Loss between 125 and 4,000Hz.
Strength: Tests the isolation performance of the assembly
in the field. It is good to include an NIC performance requirement
within your spec for operable and demountable walls.
Weakness: The NIC rating is highly dependent on the field
conditions of the tested space. Because of this, the tested rating
might not be achieved in other spaces or projects.