There are many considerations when evaluating noise levels in any given space. Air distribution is just one of those factors. With FabricAir ducts you can concentrate on the other factors because fabric is not rigid, like metal ducts, and therefore does not transmit noise. FabricAir systems typically operate in the 25-30 NC level range, but can be designed to go as low as NC 15.

Virtually silent air dispersion

Traditional ventilation systems generate noise as the air passes through the ducting and into plenum boxes and out through spot diffusers. Fabric-based air dispersion solutions create minimal resistance, thus no significant sound – as low as NC 15.

Noise level considerations differ vastly from application to application. Libraries, theaters, auditoriums, concert halls, recording studios and religious facilities are examples of applications that require very low levels of noise; hence, minimizing noise transmissions and controlling sound characteristic within the space are crucial.

The acoustic environment is influenced by many factors incl. the geometry and volume of the space; transmission, reflection and sound absorption capabilities of the materials used and surfaces inside and surrounding the space; and airborne and structure-borne sound transmission. Unwanted sounds and noise pollution can have a negative impact on health and wellbeing of the occupants, as well as on their communication and productivity. This is why minimizing the noise contribution from the ventilation solution is important.

FabricAir systems typically operate in the 25-30 NC level range, but can be designed to go as low as NC 15. This makes the technology ideal in comfort applications, as the ventilation system then does not contribute negative noise pollution to the space being conditioned. This is why fabric-based air dispersion solutions are the popular choice for theaters, concert halls, schools, and so forth.  

Fabric air dispersion as an acoustic element

Conventional ventilation solutions in metal are rigid and therefore transmit noise. Structural vibrations manifests themselves in the metal, sounds reverberate off the surface, and the airstream generates noise as it travels through the system. The classic ducts may also transport sounds like speech directly from spot diffusers in one room to spot diffusers in adjacent rooms, e.g. in an office structure.  

Fabric ducting differs from metal solutions in that they have acoustic absorption properties and do not transmit sound. This is important, as it reduces sound reverberation, by hindering the sound reflecting back into the space from the duct surface. The fabric fibers are a so-called porous absorbent that absorbs the sounds by turning sound waves into heat energy. This happens as the fibers are forced to bend by the sound waves.

In comfort applications the acoustic properties of fabric ducting are highly relevant. Sound absorption reduces reverberation time, which increases conversation privacy, makes speech more intelligible and can help reduce the general noise level in the space. This leads to a greater level of occupant comfort. The virtually silent nature of the technology means that the fabric duct system doesn’t transmit noise.

In applications like theaters, auditoriums and concert halls, conventional solutions often fall short, as they require large orifices to generate a high air change. This results in unpleasant, even unhealthy drafts, as well as transmission and reverberation of noise. The same is true for silent applications such as libraries and religious facilities. Fabric-based air dispersion technology is draft-free and virtually silent, thus offers the ideal environment in these application types. They provide a high air change with great levels of comfort.

FabricAir dispersion systems are fully customizable and can be tailored to your specific needs.