There is a lingo in the audio industry, “Play with equipment at the beginning, play with wires and design with a fever.” It can be seen that design is very important in the decoration of home theaters in villas, and sound insulation design has also attracted the attention of many owners, because good sound insulation measures can not only prevent interference with neighbors, but also have substantial meaning for listening to sound, because the relative dynamic range after the noise is reduced Increase.

First, is it necessary for home theater to be soundproofed?

Home theater sound insulation has two main meanings, one is to avoid disturbing the people, and the other is to avoid external noise interference.

The problem of nuisance is easy to understand. If you want to achieve a professional-grade home theater effect, then according to the THX standard, the average sound pressure must reach 85dB, and the maximum sound pressure at low frequencies must reach 115dB. What is the concept? It’s almost the kind of loud noise that an airplane makes when it takes off next to you. And there are often planes taking off next door, especially in the dead of night, a normal person will go crazy.

In addition, just as for better details and layering of the projected picture, we require the audio-visual room to be dark enough. The same is true for the sound. In order to hear more movie details, it is required that the home theater room be quiet enough, how quiet is it? We can refer to the civil noise control standard GB 22337-2008. Generally, we follow the noise evaluation index of NC-25, which is 35db.

Second, what materials are good for sound insulation and decoration of home theaters

1. Sound insulation treatment of doors and windows

The sound insulation characteristics of general residential doors can reach -25dB~35dB. With higher performance, iron doors of the kind used in listening rooms are rarely seen in residential buildings. In the design of the home theater, the door is replaced by a hollow double door with a cavity, the panel is made of plywood, and the middle is covered with sound-absorbing cotton. In addition, the door is made into an inclined opening and sealed with a blanket or rubber strip, which has a relatively good effect. If there is voice communication, the first thing to pay attention to is the doors and windows. To improve the sound insulation characteristics of doors and windows is usually a double-layer window structure as a sound insulation measure for windows. You can keep the existing window and add another window; or remove the existing window and reinstall a glass designed according to the new standard. All the glass is the same thickness and has the same resonant frequency. This will make the sound near this frequency stand out.

2 Ground sound insulation treatment

Pave the ground with river sand, then grind 3cm of cement on it, then pave the floor, and then lay an 8mm thick carpet. The wooden floor can be nailed into the cavity above the head, so that it can absorb frequencies below 100Hz, and the low-frequency effect of the sound will be very good. In addition, the floor is made of wood mosaic material, which has a good control over the overall sound quality. On the other hand, mosaic is the icing on the cake for the overall effect.

3. Wall sound insulation treatment

The wall materials are mainly composed of wooden diffuser panels, wooden decorative panels, fabric sound-absorbing panels and thick curtains. In order to fully reduce the sound quality, the wall can also bring a ray of sunlight to the house during non-projection time. Now the original windows are half sealed, each window can be guaranteed to be half open, and thick curtains are used. The curtain training mainly uses fabric sound-absorbing panels, and the curtain training area is an active sound quality area, using sound-absorbing materials to reduce excess sound coloring. The sound absorption material and the diffusion material are combined on the two side walls to increase the mixing time and achieve a sound quality balance. The wall opposite the curtain is a relatively inactive sound quality place in the whole house. The use area of ​​the wall processing diffusion material is larger than that of Hanyin material. The treatment of the door is also very particular, adding a layer of sound insulation material on the surface of the door to prevent sound leakage. This integrated wall sound absorption combined with the diffuser material can increase the overall sound quality of the mixing table, thereby significantly improving the sound quality. On the one hand, the application of the pillars is in harmony with the overall style; on the other hand, the pillars are wrapped in a soft bag, and after sound absorption treatment, it also meets the overall sound quality effect.