Mechanical Supplies

Acoustical Curtains

About

Kinetics Model KNC noise control curtains, modular reinforced limp mass vinyl panels, or vinyl and quilted fiberglass barrier/absorber composites, on a self-supporting track that lets the curtain open for access at almost any point. Grades run KNC-50RB and 100RB (barrier only), -RBQ (absorber facing the source) and -BQQ (barrier fully encased in quilted absorber for Class A flame and smoke), giving an average transmission loss increase of up to 29 dB.

Application

Used to screen generators, compressors, pumps and construction plant, to divide multi-purpose halls, and to enclose a noisy process temporarily while work continues around it. Velcro closures along every edge and grommets along the top are what make the seal continuous, an acoustic curtain with open vertical joints performs like no curtain at all, because sound leaks through a gap far faster than it passes through mass.

Standards & Reference 5 cited

ASTM E90
The laboratory measurement of airborne sound transmission loss: the raw data a partition's acoustic rating is derived from.
ASTM E413 (STC)
Sound Transmission Class: the single number that summarises an ASTM E90 measurement, used to compare partitions and doors.
ASTM C423 (NRC)
Sound absorption measured in a reverberation room, reported as the Noise Reduction Coefficient. Absorption, not insulation: how much sound a surface soaks up rather than blocks.
ASTM E84
Surface burning characteristics: the flame spread index and smoke developed index a material is classified by. Class A is the usual requirement in an occupied building.

Also citedNFPA 701

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