The following are some example building sections shown with their corresponding sound reduction indexes. The building sections are divided into the following categories:

• Partitions and Panels
• External Masonry Walls
• Floors and Ceilings
• Flanking Through Ceiling Cavities

Example Partitions and Panels

Partitions and panels refer to interior and non-masonry walls. The values shown assume adequate detailing at all junctions to avoid flanking effects.

External Masonry Walls

Masonry walls refer to stone, brick and blockwork constructions. The values shown assume adequate detailing at all junctions to avoid flanking effects.

Example Floors and Ceilings

Floors and ceilings refer to horizontal constructions at the bottom of or between spaces. The values shown assume adequate detailing at all junctions to avoid flanking effects.

The Effects of Flanking Through the Ceiling Cavity

When detailing acoustic partitions, it is important to consider the effect of sound flanking through the ceiling cavity. The best way to avoid this is to continue the partition through the ceiling right up to the slab. However, this is not always possible so some thought should be given to each detail.