Which part of the wall will you cover to improve sound insulation?

To enhance sound insulation, covering the edges of the door is crucial because sound can easily travel through gaps and openings. Doors often have small spaces around them where sound can leak in or out, and adding a proper seal or covering at the edges reduces this transmission. By sealing these spaces, you create a tighter barrier, significantly improving overall soundproofing.

The upper panel and lower panel may also play a role in sound insulation, but they typically do not address the critical areas where sound leakage is most prevalent—namely, the door edges. The face of the door can contribute to sound insulation as well, but without addressing the edges, the effectiveness may be limited. Therefore, focusing on the edges directly tackles the vulnerabilities where sound can interrupt the intended silence or privacy.