Insulation to control noise transmission is called?

• A. Thermal Insulation
• B. Density
• C. Acoustic Insulation
• D. Vapour Barrier

Answer: (C)

Acoustic insulation is the term used for reducing sound transmission. It focuses on how sound energy is absorbed, damped, or blocked by building assemblies so less noise passes through walls, floors, and ceilings. This is different from thermal insulation, which slows heat flow, and from vapour barriers, which control moisture movement. Density is just a material property that can influence sound blocking but isn’t the name for noise-control insulation. Materials and designs with good acoustic properties work to raise sound transmission loss and keep more sound out.