I. Sound insulation of doors and windows

1 First, you can double-layer the window and add another layer to the existing window. Of course, the window at this time should have good sealing performance. This is a low-cost and effective method. In addition, you can choose double glass, sound insulation glass and other glass with good sound insulation effect.

2. Adopt a hollow double-layer door with a cavity, with plywood as the door panel and sound-absorbing sponge in the middle.

Second, the wall sound insulation

1. Tear down the original wall and build a new soundproof wall. Chip board is added on both sides and glass fiber is filled in the middle. This scheme works well.

2. Retain the original wall and add a soundproof wall. Add some new columns to form a sound insulation wall with glass fiber inside.

3. The simplest method is to spread a layer of cement evenly on both sides of the brick wall, and improving its surface density is the most effective and economical method to increase the sound insulation effect. If it is a light wall, you can also add low-density gypsum board or cement fiber pressure board partition inside it to improve its sound insulation ability.

4. Add corrugated cardboard to the wall, hang thick curtains and add foam or sponge. The sound insulation effect is average.

Third, the floor is soundproof.

1. The structural floor can be paved with high-density environmental protection sound-absorbing cotton electrostatic pad, and then made into a 40mm thick concrete floor, and the weighted impact sound pressure level can be less than 60dB. If the wooden floor is nailed into a cavity, it will have good absorption ability for frequencies below 100Hz, and the low-frequency effect of sound will be good;

2. Lay river stone+sand on the ground, then grind 3cm cement on it, and then lay the floor. Paving pebbles under the floor can just fill the gap that is easy to cause standing waves and earthquakes, and even overcome the disadvantages of hollow wood floors, but these practices are huge.

Extended data:

For a building space, if its enclosure structure vibrates under the action of external sound field or is directly impacted by objects, it will radiate acoustic energy to the building space, so the sound outside the space will be transmitted to the building space through the enclosure structure, which is called "sound transmission". The incoming sound energy is always less than the external sound or impact energy, so the enclosure structure isolates a part of the sound energy acting on it, which is called "sound insulation".