the room next door is too noisy. How is the wall soundproof?

1. Install the sound insulation board: The sound insulation board is a kind of material specially used for sound insulation, which can effectively isolate the sound transmission. Installing a sound insulation board on the wall can effectively reduce the noise coming from the next door. 2. Install soundproof windows: If the noise next door mainly comes from windows, consider installing soundproof windows. The soundproof window can effectively isolate the spread of external noise and make the room quieter. 3. Install soundproof doors: If the noise next door mainly comes from inside the door, consider installing soundproof doors. The soundproof door can effectively isolate the noise coming from the door and make the room quieter. 4. Wall thickening: Wall thickening can effectively reduce the noise coming from next door. You can add sound insulation materials to the original wall, or you can add a layer of sound insulation board to the original wall. 5. Install sound insulation and sound absorption device: Sound insulation and sound absorption device can effectively reduce indoor noise. Sound insulation and sound absorption boards can be installed on the wall, and sound insulation and sound absorption devices, such as sound insulation curtains and carpets, can also be placed indoors.