Does acoustic insulation have R value?
In respect to this, does sound insulation have any R value?
SAFE'n'SOUND® is not branded with an R value as it's typically used in interior partition walls that do not require an R value. Therefore, SAFE'n'SOUND® would not pass an inspection if used in an exterior wall.
Also question is, what insulation is best for soundproofing?
Insulation. Loosely packed fiber provides excellent sound absorption, which is a factor in soundproofing, albeit a minor one. Standard fiberglass insulation is as effective as mineral wool, and much less costly. Foams give great thermal insulation but are actually poor for soundproofing.
Common fiberglass insulation Fibreglass insulation does offer some absorption qualities that are useful, and like soundproof wallpaper, may be able to reduce the sound of mid-range frequencies. But in terms of soundproofing a room and significantly lowering the noise levels, it doesn't offer much help at all.