Privacy Board and Return-Air Silencers
When office spaces share a common plenum, most often the walls do not continue all the way to the floor / ceiling structure above. Regardless of the acoustical integrity of wall partitions or ceiling systems, unwanted sound (noise) can travel through non-ducted plenum spaces and return-air grilles.
AcoustiGuard® Privacy Board® System solves the problem of flanking airborne sound transmission above the suspended (drop) ceilings and over interior partition walls. The standard practice of an open plenum above the drop ceiling grid has provided for much lower cost return-air duct construction – unfortunately at the expense of sound transmission, speech privacy and work-place comfort. Sound attenuation through two layers of ceiling tiles from office to office or boardroom to open office areas or health care examination rooms to waiting rooms will typically only achieve a CAC rating of approximately 35 dB. Even less when a return-air register (egg crate grill) is present. The specified STC rating of a partition wall assembly is irrelevant when the sound-flanking path between rooms is through the suspended ceiling and over the incomplete partition wall. The AcoustiGuard™ Privacy Board™ barrier solves this problem with a product that is quicker and easier to install and much less messy than the installation of gypsum wallboard (GWB) extension walls.
Uncontrolled noise and lack of speech privacy can irritate, distract and affect productivity. The AcoustiGuard™ Privacy Board system blocks the area between the top of the partition wall and the structure above without interfering with the air distribution. It is an easy to install effective barrier that provides acoustic privacy.
Return-Air Silencers solve the problem of HVAC return-air ensuring the acoustic treatment “does no harm” to the HVAC system while maintaining acoustic isolation through the Privacy Board™ barrier