it's designed to deaden the clipity clip sound when you were walking with hard sole shoes on hard surface laminate floors. Towards the end of where it mentions quiet walk underlayment, I would totally forget about that. I think the writer watched someone install carpet once and is now describing the procedures as best he or she remembers. I can't believe I read through that entire article. You could even use a professional soundproofing tape Dynatape. However, if you want to use MLV on its own, tape it down to prevent airborne noise from slipping through the floor. If you end up topping it off with another carpet underlay, you probably won’t need to connect the MLV pieces with tape. When it’s as flat as it can be, use double-sided carpeting tape or nail the edges into the subfloor. You’ll probably have to let the material settle for a few hours after you roll it out. If you decide to include MLV, you could order just enough to cover the entire surface of your floor. In this case, the dense material would really make your floor more impenetrable to airborne noise as well as absorb any impact noise footsteps might produce. It can also help you soundproof walls, ceilings - you name it, you can probably attach MLV to it. Mass loaded vinyl is a fantastic soundproofing material, whether you want to use it under or over flooring surfaces, or even under the subfloor. So even if you didn’t have insulation under the subfloor, it wouldn’t matter. If you’re worried about airborne noise, MLV can thicken up your floor. Before you go in with softer padding, you should consider laying mass loaded vinyl directly on top of your subfloor. I'll probably purchase the thicket stuff and lay it down and let the carpet installer just put down their standard underlay on top of it.Ħ. Here is some info I found online prior to posting here which gave me the idea. The reason I thought about using it for carpet is although expensive it is effective. The different the MLV made in the panels is amazing. I once owned a truck that had 2, Gigahertz of power going to 14 speakers. Yeah I've used MLV quit a bit in the past in my cars as well. Remember, those who sell to you, do not have your best interest at heart. I have not really looked into it more than that, but I would highly recommend testing your hypothesis before spending the money. I know for panel loading, there is a 1/3 rule which is to say anything over 1/3 and the returns diminish substantially. The thing with mass loading, is that is it is not a cumulative function where more is linear to better. Tarkett sells a mass loaded PVC with a rubberized/foam backing that claims it reduces sound transmission by 6? dB, I know it is heavy and I suppose it must work or someone smarter than I am would have called them on it. I am not positive how well it would work under carpet and padding and would be leery of anyone that told me it would work. I will say, where open air exists and you are trying to reduce transmission it works rather well. I have mass loaded door panels in my car to reduce the vibration they create when someone pumps, oh i dont know, 1200 W RMS of mid bass into them. It is a great way to prevent sound amplifications from source. As opposed to reflection reductions that dissipate soundwaves (vibration) mass loading "absorbs" them and does not let the energy transfer from, in this case open air, to the wooden structure of plywood subfloor/joist/drywall and back to open air where it will be head once more. Mass Loading is a form of sound proofing that works by retarding the vibration transmission from one surface to the next.
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