Sound insulation provides resistance to the passage of sound through walls and floors and within a building – sound is categorised as either ‘airborne’ (through talking, or home entertainment systems) or ‘impact’ (generated through an impact striking on the floor e.g footsteps).

Sound Insulation Testing is the methodology used to quantify the resistance to the passage of sound through the walls and floors of adjoining buildings e.g. between adjoining walls of a pair of semi-detached houses; through the floor linking an upstairs flat to the commercial office below or through the wall of adjoining hotel rooms.