![]() ![]() In a processing plant, for example, sound screen curtains can be installed on frames with castor wheels in order to make them mobile. You can find them on generators, pumps, heat exchangers, etc. MLV sheets are hung on rods then hung around loud machinery to act as sound screens. Create Acoustic Blankets around Noisy Machinery.A mass of MLV with minimal thickness can be added between dry walls to achieve superior soundproofing. Its ability to be flexible means it can be lined on floors, ceilings, and against doors to help reduce noise. Soundproofing for Homes and Commercial Buildings.Read also: Soundproofing Hardwood Floors in Condo & Townhouse As such, they are used for isolating vibrations, absorbing shock and soundproofing. ![]() Viscoelastic materials dissipate energy/heat when stress is applied. ![]() Their strain rate is time-dependent because of the viscosity factor. Viscoelastic materials express both viscous and elastic properties. On the other hand, an elastic material like rubber strains when force is applied, and they snap back into their original shape after the stress is lifted. High viscous materials like gel or honey resist shear flow and express linear stress when force is applied. Viscoelastic materials are known to have a sound dampening effect like that in acoustical fire batts, door seals and soundproof drywall. In perspective it could be polyvinyl chloride or vinyl (the viscoelastic material) filled with a salt like barium sulfate or calcium carbonate (the inert material). It has been used as an effective sound barrier since the 1960s. Regardless of your needs, Commercial Acoustics has years of experience installing Mass Loaded Vinyl and Wall Blokker products, to offer our a clients a full range of solutions for their unique problems.Mass loaded vinyl is a viscoelastic material loaded with an inert material. Along with the cost savings achieved when using MLV instead of extra drywall layers, MLV also provides schedule savings with it’s speed and ease of installation. Whether you decide to go with an EVA or PVC-based Noise Barrier, using MLV as opposed to multiple layers of drywall is typically always the best option. When using Wall Blokker or other MLV types on Wood Studs, you can achieve the best results when also using RC, or if the Wood Studs are staggered. While Wall Blokker is equally heavy as other types of Mass Loaded Vinyl, the improved flexibility also improves the sound-blocking capacity, on both Wood and Metal stud walls. This is why older plastic toys break easily if left outside for a few weeks. The downside of this is 1) added cost, and 2) the plasticizer migrates out of the product over time, causing the PVC to become brittle. In order to make it flexible, you need to add a softening agent, known as a “ plasticizer”. One major difference is that PVC is a naturally rigid material (think exterior panels for housing or fences). After several years of product development, followed by 18 months of fire and acoustical testing, Commercial Acoustics has developed an EVA-based Mass Loaded Vinyl soundproofing membrane that has improved the performance without sacrificing cost competitiveness. However, the PVC-base of the product has not changed – until recently. This has led to a number of improvements in manufacturing and a search for cheaper filler alternatives. The focus on MLV sound barrier product development has been on how to make the product cheaper, and thus more applicable to residential and commercial settings. Although multiple layers of drywall can improve wall STC ratings, it would take a lot more layers, time and money to get the same results as one layer of MLV in most cases. Oftentimes, MLV is used to Value Engineer (VE) out multiple layers of drywall. Mass Loaded Vinyl Specifications Types of Mass Loaded Vinyl Both PVC and EVA-based noise barriers provide cost and schedule savings when used in place of multiple layers of drywall. The initial versions of MLV sound barrier included Lead as well but was replaced over the years due to health concerns. As we’ve discussed before, Mass Loaded Vinyl is a PVC-based product that adds a cheap filler, usually Calcium Carbonate or Barium Sulfate, to provide superior sound ratings. While Mass Loaded Vinyl, also called MLV, has been a dependable and competitive product to improve STC in industrial settings for decades, there has been little improvement in the product itself in recent years. However, which one is right for your project? Consider the pros and cons of each Mass Loaded Vinyl category below. Thinner than drywall, and much more effective at blocking sound transfer, EVA and PVC Noise Barriers both provide significant improvement in wall soundproofing levels. Mass Loaded Vinyl continues to be a leading product for enhancing STC in partitions, particularly in the residential, multi-family, and hospitality sectors. ![]()
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