Noise problems in buildings come from airborne and impact sound acoustic transmission sources. Airborne sound emanates from sources such as TV, stereo equipment etc and travels through the air into premises. Impact sound arises mechanically, walking, moving furniture etc. Sound can bypass insulating materials; mechanical bridging or hidden cavities, such as poor mortar joints or inadequate dry lining. Isomass Ltd. offers acoustic floor, acoustic wall and acoustic ceiling systems, battens, cradles, overlays, underlays and acoustic sealants.