Things You Should Know About Noise Control Materials

By Author: Henry Janice
Total Articles: 125
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Sound absorbers are porous, soft and open celled materials like fiberglass blankets or foam sheets and baffles that lessen the reflection of sound waves. Their sound absorption effectiveness is rated by an NRC number.
NRC is basically a sound absorption rating. Eau Claire noise control materials measure a percentage of the amount of sound that won’t be reflected back from where it came.
Noise barrier
Noise barriers blend flexibility, mass and limpness to block noise from transmitting from one area to another. Flexible mass loaded vinyl sheeting has replaced thin lead sheets as the preferred noise barrier. Noise barriers are rated by the STC number. The higher the STC rating, the more effective the product is at blocking noise.
Sound Transmission Class- Number rating or airborne sound insulation of a partition, derived by fitting a reference rating curve to the sound transmission loss values measured for the frequency bands with nominal mid-band frequencies by a standard technique. The standard technique ...
... used is ASTM Standard E90. This test is valid for multiple layers, single homogenous layers, or complete assemblies. A higher STC rating generally represents a better ability to prevent the noise, frequency notwithstanding.
Noise composites
Noise control materials are products that blend both sound absorber and noise barrier materials. Generally, they provide the most substantial overall noise reduction. Acoustical composites are rated in both STC and NRC numbers. Sound seal uses composite materials like acoustical curtain systems, duct and acoustical pipe logging, or panels.
The aspects for controlling noise we will address are the wall noise and ceiling. First of all, we have to assume that most of the noise comes.
Drop ceilings are known for permitting noise to travel. They have open space that carries vibrations conveniently across the open areas above them. It is needless to mention the grid that connects to all the suspension ties and walls hat connect the ceiling to the most frequently steel rafter ceiling. All these materials enable for a conduit for noise to travel along, both the construction materials and the open space.
Ceiling solutions: There are quite some products that can help with this. For beginners, replace standard drop ceilings with acoustic fiberglass ceiling tiles or melamine acoustic tiles. Ceiling tiles will prevent noise transmission through them and also enhance acoustics in the space with their absorbent properties. These are also known to enhance the aesthetic look of the space. Secondly, there are special ceiling tile barriers that can be laid on top of the grid and ceiling tiles. These are fiberglass with barrier composites that will block the additional noise travelling through the ceilings. Used in the same way can be a mass loaded vinyl barrier that is a heavy sheet and works like a noise barrier.
I hope this assists you determine how to treat this noise issue in your space.