The structure and sealing performance of the window frame are crucial. High-quality aluminum windows usually adopt a multi-cavity structure design, which can effectively block the propagation of sound. Good sealing strips and sealing processes can reduce the sound from entering the room through the gap. Secondly, the type and thickness of glass have a greater impact on the sound insulation effect. Multi-layer insulating glass, such as double-layer or triple-layer insulating glass, has an air layer in the middle that can effectively block the sound. Moreover, the thicker the glass, the better the sound insulation performance is usually. In addition, the quality of hardware accessories will also affect the sealing and stability of the window, thereby indirectly affecting the sound insulation effect.