To minimize sound transmission in the upper floor Residential Units, what should be used on the walls?

Using gypsum board on studs is an effective method to minimize sound transmission in upper floor residential units. This approach provides a sound-dampening barrier due to the density and mass of the gypsum material, which helps absorb sound vibrations. The installation of gypsum board creates a physical separation that reduces airborne sound transmission between units, making it a commonly recommended practice in building design for residential spaces.

Gypsum board is also advantageous because it can be easily installed and finished, providing not just soundproofing benefits but also fire resistance and aesthetic value. The framing with studs helps create an air cavity that further enhances sound insulation by interrupting the direct path of sound waves, making it a preferred choice in constructing walls in multi-family residential buildings.

Other options, while they may serve different purposes, do not provide the same level of sound mitigation. For example, concrete hollow block (CHB) walls offer substantial structural strength but may not be as effective in reducing airborne sound compared to gypsum board. Similarly, double plywood partitions may provide some sound attenuation but lack the soundproofing properties inherent to gypsum board designs. Plastic panels do not offer significant sound dampening capabilities and are primarily used for aesthetic applications rather than acoustic performance.