3. Flanking Noise Paths

3.1 Flanking paths are a major area where systems fail. (e.g systems that allow noise to pass from one space to another through the ceiling lining over the top of the wall). This affects walls and ceilings, so understanding this before we address the wall and ceiling systems is important.

3.2 It is often leakage at junctions, i.e. wall to wall, wall to ceiling, wall to floor, that fails the system, not the larger surface areas. I.e. the attention to detail is critical. Ensure that all junctions are caulked in accordance with the manufacturer’s recommendations in relation to both materials and installation.

3.3 Tested systems such as those found in publications such as CSR’s Red Book, Boral Plasterboard’s Technical Manual etc are achieved under controlled conditions. To replicate the system performance on site, it is critical that attention to detail in both Design and Construction is enforced. Even the most basic principles, if ignored, can seriously downgrade the acoustic performance of a building element.

3.4 The acoustic performance of walls is affected by penetrations and recesses in building fabric requiring acoustic ratings e.g fittings, fixtures, power boxes. The effects of various combinations of framing arrangement, acoustic treatments and wall linings can be seen in the typical flanking paths depicted below.