plenum barrier

plenum barrier

In suspended ceiling construction, a material or structural barrier erected in a plenum over a partition; used to reduce sound transmission between adjoining rooms by way of this path over the partition.
References in periodicals archive ?
Early incorporation of the system in a project can reduce costs by eliminating the need for extra insulation or layers of drywall, plenum barriers, and high-spec or permanent walls around private offices.
Closed plan designs use walls and plenum barriers to block sound, but blocking is also a relevant technique for open concept offices.