Sound Transmission Class is an average performance over all audible frequencies so a lower STC Rated Wall can actually be more desirable depending on what level sound frequency we are trying to stop. Green Glue: 5/8" Drywall / 2 Tubes of Green Glue / 5/8" Drywall (on Both Sides).MLV Limply Hung: MLV installed directly to stud (on both sides) with 2 Layers of 5/8" Drywall (on Both Sides).MLV Sandwich: 5/8" Drywall / MLV / 5/8" Drywall (on Both Sides).Reference Wall: 2 Layers of 5/8" Drywall (on Both Sides).*All walls have Wood Studs and R-13 Fiberglass Batts The tests we will discuss involve four separate walls listed below: We will discuss the results of four separate wall structures including Sound Transmission Class (STC Value) as well as the transmission loss at varying frequencies. By damping these vibrations, Green Glue compound is able to reduce the amount of sound transferring from one side of the structure to the other. Green Glue Noiseproofing Compound is a viscoelastic damping compound that is used between layers of drywall in walls, ceilings, and floors to drastically dampen vibrations. What is Green Glue Noiseproofing Compound? MLV is either installed directly to the wall studs (ceiling floor joists) or sandwiched between two layers of drywall (plywood, subfloor,etc). The dense yet limp material is designed to block sound transmission and prevent sound transmission from going through the barrier. Mass Loaded Vinyl is designed to be very dense yet remain flexible and limp. Mass Loaded Vinyl is a a thin flexible barrier which is comprised of PVC or barium based ingredients. This article is going to show the Sound Transmission Class compares in wall structures that include Mass Loaded Vinyl and a wall that includes Green Glue. Green Glue Noiseproofing Compound and Mass Loaded Vinyl are not actually competitive products however they are both used as "soundproofing" materials. XPS Extruded Polystyrene Board Sealing Joint Tape.
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