Selection of soundproof materials:
There are also many other options when it comes to choosing sound proofing materials. Open celled foams, better known as acoustic foam, are excellent soundproofing options and can be used in sound absorption as well. A type of vinyl material called Mass Loaded Vinyl (MLV) is also a popular soundproofing option. This material is lightweight but has a much higher mass than what can be expected of a thin material, which lends it its soundproofing ability.
Sound absorption has different needs than that of soundproofing as it has more to do with the enhancement of the quality of sound in the desired space. Be it a sound recording studio, a conference hall or the room in your home where you place the home theater system, it is essential to deaden unwanted noises and enhance the positive noises in the process.
In places like recording studios, where the sound quality is of utmost importance, the extreme step is to construct a room within room; that is, to add an extra layer of wall to the entire space and even the floor. But for less intensive requirements, special foams that loosely resemble egg crates and sound boards can be used to facilitate absorption of sound. The material that is considered the best soundproofing material for sound absorption purposes is sheetrock. When used between walls and along with rock wool insulation, it offers excellent results. This material though, is quite expensive and works best when installed prior to construction of the space.