The measures to be taken in the home theater audio-visual room decoration include sound insulation and sound absorption. The object is invisible sound, which is definitely quite difficult. A certain skill is required in the actual processing, and only in terms of soundproofing countermeasures, there are great differences in the environment and the reproduction volume. Generally, the sound insulation measures to be made are divided into three levels: one is to soundproof the door and the window; the other is to soundproof the six sides of the room; the third is to build a "room in the room". The following is explained separately. The most basic consideration is to strengthen the weaker part first. It is important that the key to sound insulation is balanced. For example, in the case of a steel plate concrete structure, the sound insulation of a concrete wall can reach -50 dB, while the sound insulation of a window is only -25 dB. There is a gap of -25dB between the two. Eliminating this gap is the goal of sound insulation engineering. Even if you improve the sound insulation of the surrounding walls to -60dB, the measures taken on the original window will still have a sound insulation of only -25dB. Like a deep bucket, missing a part, the water flows out of it, and the depth of the bucket can only be counted as a defect. For the sound, it is also a truth. Before taking sound insulation measures in the listening room, carefully analyze where the sound will run away. Take measures on the walls and the ground, but don't forget the windows and doors in the room, they are relatively weak parts. The sound leaked out of these places, and the overall sound insulation of the room was impossible. If there is voice foreign exchange, the first thing to focus on is the window and the door. As a countermeasure against sound insulation of a window, a structure of a double-layered window is usually used. You can keep the existing windows and add a new window; or remove the existing windows and reinstall a glass that is designed to the same new standard and have the same resonant frequency. This will make the sound near the frequency stand out. In general, the interval between two windows should be 20cm-30cm. To achieve the same -50 dB sound insulation effect as a concrete wall, it is preferable to have a spacing of more than 30 cm between the two layers of glass. It would be better if you could take some sound-absorbing measures in this interval. Proper construction, the room can guarantee -50dB sound insulation. The second weak link is the door. The worst sound insulation effect is the number of doors installed in general collective apartments and simple home decoration. There is no small gap between the door and the door frame of the plywood nails, and the sound insulation characteristics are at most -15dB. The sound insulation characteristics of general residential doors can reach -25dB~-35dB. The higher performance, the kind of iron door used in the monitor room is rarely seen in the home. Nowadays, the increasing number of double-layer security doors have good sound insulation properties. In order to convert a plywood door into a soundproof door, it should be considered that the sound insulation characteristics of the door are consistent with the sound insulation characteristics of the wall. If the sound insulation of the room wall is only -30dB, installing a door with a sound insulation of -35dB will be suspected of over-quality. Moreover, due to the different manufacturers, the -30dB and -35dB doors have great differences in price. Price cost is a very sensitive topic. Can you use some remedies yourself? If you do it yourself to improve the airtightness of the door, you can also paste some kind of door glue strips or sponges. Because the spacing of the door frames is relatively reduced, the sound insulation characteristics are somewhat improved. As for how much the sound insulation characteristics can be improved, the empirical data is generally not more than -3dB~-5dB. It's not that there is no effect at all, and it's better to stick something than the original one. The front said that windows and doors are the weakest part of the activity. The next work is to enhance the sound insulation properties of various walls. The load-bearing walls of ordinary houses are made of steel plate concrete or solid bricks, which have good sound insulation effect. The problem is more than the light hollow brick or gray cardboard used in the partition wall, the sound insulation characteristics are only -25dB~-30dB. Most home theater rooms have one or two walls that are such a structure. There is no doubt that this is the most serious place to generate sound leaks in addition to windows and doors. If no measures are taken, the air vibration in the middle of the hollow brick will cause the wall to resonate, which is very unfavorable for the sound quality. There are two ways to solve it. One is to remove the original wall and rebuild a soundproof wall; the second is to retain the original wall and add a soundproof wall. Both methods have their own advantages and disadvantages. The first method is to remove the original wallboard, add gray cardboard on both sides, and stuff the glass fiber between them. This kind of scheme will have a good effect. The second method is to retain the original partition wall, and add a few columns to form a sound insulation wall with glass fiber inside. This solution adds a wall and the sound insulation is better than the previous one. However, its shortcoming is to reduce the width of the room by a few centimeters. In places where there is limited room space such as apartments, it may be appropriate to recreate the soundproof walls. If you are very concerned about the space of the room, choosing a commercially available sound insulation board (lead board) is also a way. However, this method is more than double the cost of achieving the same sound insulation effect compared to the first scheme described above. The following is a true qualification sound insulation countermeasure. To achieve true sound insulation, it is natural to implement sound insulation measures on the six sides of the room. If only a certain sound insulation performance is added to the walls (partition walls) of adjacent rooms, the influence of the ground and ceiling on the sound will be highlighted. In order to prevent this from happening, the completely cut-off sound insulation must be taken correspondingly for the six faces of the room. To better improve the sound insulation of the room, it is to recreate a room in the room, the so-called "room in the room" structure. As the name suggests, the “room in the room†is to take strict sound insulation measures on the four walls, the floor and the ceiling. The final result is to construct a room inside the room. This structure is used in all studios. The sincerity created in this way is that the sound insulation characteristics are higher than -50dB. It can even match the ideal sound insulation characteristics of -60dB~65dB recording studio. In order to completely isolate the inner and outer walls and not transmit any sound vibration, it is necessary to use an isolation device for the structure of the "room in the chamber", and the construction is complicated. This type of soundproof wall does not allow installation slots for power outlets, audio equipment, telephones, air conditioners, etc. Therefore, in the actual planning, you should consult a large decoration company with corresponding qualifications. The manufacturing cost of the "room in the room" will be much higher than any of the previous transformation methods, reaching more than 10,000 yuan per square meter. Obviously this is not what the average working class can expect. Sound insulation must be graded in the end, and what kind of standards should be met in your home theater. Therefore, it is necessary to take appropriate measures. It is most important to spend the least amount of money to get the sound insulation effect equivalent to your own economic ability and appreciation level. Traffic Facilities,Waterproof Traffic Facilities,Outdoor Traffic Facilities,Traffic Control Devices Yangzhou Heli Photoelectric Co., Ltd. , https://www.heli-eee.com
First, improve the sound insulation characteristics of windows and doors
Second, enhance the sound insulation characteristics of the wall
Third, create a "room in the room"