The Top 3 Techniques When Designing for Noise Control

Association of Construction and Development
July 23, 2012 — 1,344 views  

When a client approaches you about soundproofing, you'll want to be able to deliver as many options as possible. Consider the following noise control techniques to help consumers improve their property's acoustics.


There are two ways you can use damping to your advantage. Essentially, what you're doing is adding an extra layer to a section of a room, so you'll want to find materials that work well on any surface.

Unconstrained layer damping might prove effective, as it involves applying a high-damping material directly to a surface. Such materials could include a coal tar epoxy protective coating, which works well on structural metals.

Additionally, you might consider a constrained layer where a laminate is constructed. This technique can be stuck on components - indoors or outside - and covers about 80 percent of a flat surface area. It is a more rugged option, and may result in a 5- to 25-decibel reduction in noise.


Eliminating the amount of noise that travels through a duct system can help improve the quality of a business or home. You can make applications to heating and cooling systems, openings in walls and ventilation units to improve a property's acoustics.

You could achieve a 10- to 20-decibel reduction in the amount of airborne noise with acoustic absorbent. Foam or fiberglass options have proven their worth to contractors across the country, but alternatives are still available.

For instance, you might consider using an absorbent that is angled to fit a specific opening. It may require additional care to complete this properly, but allows you to limit the duct vibration. However, it might be worthwhile to consider using cloth-faced absorbent in sections where flow velocities are high.

Fan installations

Axial flow or centrifugal fans can be loud, but you can raise their efficiency to lower the amount of noise they create. Be careful when making adjustments to these units - if you are not, you could actually increase their noise levels.

Making bends close to the fan, particularly near the intake side, could make a significant difference. Meanwhile, dampers close to the exhaust or fan intake may create more comfortable conditions for businesses and homeowners. Each of these techniques will lower a fan's power consumption, yet allow the unit to maintain its efficiency. 

Association of Construction and Development