In a partition between offices, what feature helps reduce sound transmission?

• A. Insulation
• B. Glass panels
• C. Concrete block
• D. Acoustic ceiling tile

Answer: (A)

Reducing sound transmission between offices depends on the wall assembly’s ability to block airborne sound. Filling the partition cavity with insulation introduces porous material that absorbs and dampens sound energy as it tries to pass through, which lowers the amount of sound that makes it to the other side. This makes insulation in the wall cavity the most effective feature for improving sound isolation.

Glass panels, unless specially laminated and well-sealed, tend to transmit more sound than they block. Concrete block adds mass and can reduce transmission, but in typical interior office partitions it’s impractical and not the standard feature called for. Acoustic ceiling tile affects the ceiling space, not the partition itself, so it doesn’t directly reduce sound transmission through the wall.