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Noise Control

Flanking Sound

Problem: Excessive noise transmission through the floor, especially footstep and impact sound.

Cause: Flanking transmission down the walls.


  • Attach drywall to ceilings and both sides of walls using resilient metal furring. This reduces flanking sound travelling down the walls to the room below as shown in Figure 18a and 18b.

Flanking Down Walls

Figure 18a - Flanking Down Walls

Correcting Flanking Down Walls

Figure 18b - Correcting Flanking Down Walls