Acoustical Solutions

The use of acoustical materials to form the interior finished surfaces of rooms has become a standard concept in present day architecture.

The control of sound is achieved either by absorbing sound, or by blocking it.

Longboard offers a wide range of perforated, open and closed joint wall, ceiling and screening products that can be used in conjunction with the appropriate acoustical materials to create effective acoustical treatment solutions.

Longboard also offers selected perforated products with the well known Soundtex acoustical scrim applied as an optional feature.

Acoustical Performance

There are three main areas of interest involving the acoustic performance of interior surfaces: sound absorption, sound transmission and sound reflection/diffusion.

Sound Absorption

Sound absorption is important for reducing the overall noise level in an area and for preventing “echoing” of sound. The common measurement is the Noise Reduction Coefficient (NRC). NRC can be achieved with Longboard systems that utilize openings in various forms like perforations, reveals, or grooves. These openings allow a percentage of sound energy to pass through into the sound absorbing materials (e.g. Soundtex scrim, fiberglass or mineral fiber batt) positioned beyond the openings.

Sound Attenuation (Blocking)

Sound attenuation rates the performance of a ceiling system as a barrier to airborne sound transmission through a common plenum between adjacent closed spaces, such as offices. This property is measured as the Ceiling Articulation Class (CAC), with higher numbers indicating better performance.

Sound Reflection/Diffusion

Acoustical materials may provide a means of reflecting or diffusing sound. The degree of reflection and the amount of diffusion are greatly affected by the type of material, density of the material and surface finish.


Metal Linear Ceilings – Closed Joint Systems	NRC	SAA	Backer
6” V-Groove Plank	0.15	0.12	-
6” V-Groove Plank with Insulation	0.10	0.11	Fiberglass 1” thickness @ 3 lbs/ft³
6” Perforated Plank with 1” Insulation	0.70	0.70	Fiberglass 1” thickness @ 3lbs/ft³
6” Perforated Plank with 2” Insulation	0.95	0.96	Fiberglass 2” thickness @ 3lbs/ft³
6” Perforated Plank with Soundtex®	0.75	0.75	Soundtex Scrim
2-1/2” Perforated Planks with Insulation	0.70	0.72	Fiberglass 1” thickness @ 3lbs/ft³
2-1/2” Perforated Planks	0.05	0.03	-

The test reported in this document conformed explicitly with ASTM C423-17 “Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.”


Metal Linear Ceilings – Open Joint Systems	NRC	SAA	Backer
6” LINK & LOCK BAFFLES	0.10	0.12	-
6” LINK & LOCK BAFFLES @ 6” O.C. with Insulation	0.80	0.81	Fiberglass 1” thickness @ 3 lbs/ft³
4” DAUNTLESS BAFFLES @ 6” O.C. with Insulation	0.75	0.75	Fiberglass 1” thickness @ 3lbs/ft3
6” DAUNTLESS BAFFLES @ 6” O.C. with Insulation	0.79	0.80	Fiberglass 1” thickness @ 3lbs/ft3
6” DAUNTLESS BAFFLES @ 6” O.C.	0.05	0.05	-
6” DAUNTLESS BAFFLES @ 6” O.C. with Insulation (above rails)	0.65	0.65	Fiberglass 1” thickness @ 3lbs/ft3

The test reported in this document conformed explicitly with ASTM C423-17 “Standard Test Method for Sound Absorption and Sound Absorption Coefficients by the Reverberation Room Method.”

Longboard® is Innovative Sustainable Quality Visually Stunning

Perforation & Acoustics

We offer perforation options to offer designers freedom in achieving their desired look while also delivering acoustically enhancing capabilities.

These products meet the same quality and environmental benchmarks of our other products, including being VOC free, LBC red list free, 100% recyclable, and offering up to LR.73 light reflectance.

Through independent testing we have been able to achieve NRC ratings of between 0.7 and 0.8 that verifies our new perforated ceiling systems will reduce reverberation and achieve sound absorption needs.

Explore the possibilities with the freedom to create a visually stunning space with a product that also serves a practical purpose.

Acoustical Solutions