![]() The more surface area a certain material has the better absorber it will likely be. The absorbed sound energy has not vanished, it’s actually been converted into kinetic (vibration of a solid material) and thermal energy (heat due to friction within a porous material) or has simply passed right through the material (transmission). When sound waves meet a room surface such as a wall, ceiling or floor, some of the sound energy is reflected back into the room and the rest is considered to be “absorbed”. However, let’s delve in closer and decipher what is actually usable information, and what is just marketing. ![]() On the surface this sounds like an extremely efficient product. We recently encountered an acoustical ceiling tile which was said to “absorb 50% of sound”. It should not be assumed that something which sounds technical is, in fact, backed up by proper testing. Also, given sheer volume of information available on the internet, it is perhaps unavoidable that some info will be incomplete or simply incorrect. In both scenarios, it is important to know which data is relevant and helpful. These are two separate acoustic issues which require separate solutions. If the problem is sound passing in between spaces, like offices or apartments, then isolation treatment is required. In an overly reverberant auditorium, absorptive treatment is needed to reduce echoes and improve speech intelligibility. In order to make informed decisions about acoustical treatment, it is vital to know the difference between materials that are meant to absorb sound within a room and materials that are meant to block sound from leaving or entering it. Part 1: Acoustic Terminology – Sound Absorption vs Sound Isolation In this series, acoustician Cameron Girard of Acoustics First® hopes to help you distinguish between what’s useful and what’s not. This flood of information can seem intimidating, especially to beginners. I do not doubt that as the Soundsulate brand grows, it will become a premium product within the market as long as they don’t outprice themselves.For anyone new to the world of acoustics, there is a multitude of terms, coefficients and numbers that are thrown around. Soundsulate has been around since 2015 and is manufactured in the US. They are very competitively priced at an average of $2/sp ft and committed to delivering quality. Whats impressed me most about this Soundsulate product is their ability to exceed people’s expectations, especially when comparing their prices. It can also be used as an acoustic wrap for machinery, equipment, and ductwork. Typical applications include applying over studs, joists, or suspended ceilings. To your ear, this may sound like 1/4 of the sound you heard without MLV. Soundsulate offers an STC rating of 27, which reduces loud speech to audible but not understandable. It is designed to reduce noise transmission through floors, walls, and ceilings. Soundsulate MLV is very thin and flexible, and these characteristics make it a great choice for a variety of sound control applications without compromising space. ![]() You can get up to 35 STC by using 2lb per sq ft and 1/4” thickness however, this is slightly more difficult to work with. Mass Loaded Vinyl (MLV) is an effective material to use in lining soundproofing curtains or blankets.Īt even just ½LB per sq ft, MLV can produce a 25 STC rating, which is 1/16” thickness. Mass is a critical component in sound control and works by simply stopping sound from vibrating through its structure.
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