[Home Theater Network HDAV.com.cn] To decorate an audio-visual room, there are actually three steps - first the base layer processing, then the wiring, and finally the surface treatment of the audio-visual room. Today, the theater will explain in detail to everyone, how to do the grassroots processing of the theater. Or just point it out, today we talk about how to build an elastic force reduction wall.
First, what is the elastic reduction wall
The elastic force reducing wall is a wall structure constructed by elastic reducing members and various sound insulating materials and decorative plates. His main role is sound insulation and low frequency absorption.
We know that sound propagation has two paths: air transmission (wall and gap) and structural sound (rigid structural connection). Sound insulation is to block the spread of sound. To reduce the sound of air, one is to increase the sound insulation of the wall, and the other is to seal the gap. To reduce the structure of the sound, you need to cut off the way the sound solids are transmitted (sound bridge). The unique elastic damping characteristics of the shock-absorbing sound insulator used to create the elastic force-reducing wall, together with the corresponding sound-insulating structure, are specially treated for these two types of sound propagation modes, effectively improving the sound insulation performance of the room.
Second, the three characteristics of the elastic force reduction structure
1. The vibration-damping sound insulator and the cover plate form an elastic structure—the low-frequency sound energy transmitted to the wall is converted into heat energy by the vibration of the elastic structure, which greatly improves the low-frequency sound insulation performance.
2. Cut off the sound bridge – the wall, top surface and floor structure of the suspended structure can cut off the physical conduction of sound.
3, closed cavity - on the one hand to prevent the leakage of the gap, on the other hand, constitute a thin plate resonant sound absorption structure, with the characteristics of low frequency absorption.
Third, create an elastic reduction wall
In fact, the elastic force reduction structure is mainly the low frequency part of the processed sound, and the medium and high frequency is treated by the sound insulation felt in the multilayer structure. The sound insulating felt and the sheet block the air, and the elastic force reducing member blocks the structural sound transmission caused by the rigid structural connection.
Fourth, the force reduction parts
The force-reducing parts are actually two kinds of materials, one is a shock absorbing part, and the other is a shock absorbing keel. The shock absorbing parts are composed of two-sided hardware and tight rubber, which completely eliminates the safety hazard caused by rubber life. Rubber as a medium completely eliminates the rigid connection between the shock keel and the wall. This shock absorbing structure is 100% metal-free and eliminates resonance noise.
The hardware is made of 2mm stamped steel with a thickness of 2mm. The surface is nickel-plated and has good rust resistance.
The rubber parts are molded by a new material NR modified formula, which has good softness and long service life.
Shock absorbing keel is rolled by Q195 galvanized steel strip
The shock keel thickness is 0.45 thick and 0.60 thick.
0.45 thick keel on the wall, 0.60 thick keel on the ceiling and ground
Shock absorber size (HWD): 100 mm * 26 mm * 30 mm
Shock keel length: 2500 mm
Fifth, the order of construction
First, the top surface, the ground, the opposite side wall, and the other two side walls, six sides of the "room in the room" elastic force reduction structure is formed.
Sixth, the structure of the most basic force reduction wall
The sound insulation strength and thickness of the force-reducing wall are controllable. The most conventional structure can be seen in the figure below.
Seven, the structure of the evolution of the force reduction wall
This is the most basic structure. For particularly demanding, it can be re-evolved in the wall and wooden keel.
For example, first hit the wooden keel and put in the wave-sealing board.
A sound insulation felt is added to the board, and the force reduction structural member is added.
Re-sealing the plate, pay attention to keep it hollow.
The wall keel can be made 50cm apart, and if it is the ground, it must be 30cm. A shock keel length is 2.5m, and every 50cm, it is equipped with a shock absorber.
Eight, must pay attention to the place
If you want to reinforce the compartment in the middle and high frequency sections, you can also attach the soundproof mat to the place in the structure below.
In addition, if you use gypsum board directly on the periphery of the force-reduction structure, your structure will be abandoned for two reasons:
First: gypsum board is a lightweight material with low density and poor sound insulation. Here, a material with a high density and a large weight is used, which is similar to a calcium silicate board (cement board).
Second: Since the gypsum board is very light, his resonance frequency will become higher when used in conjunction with the elastic structure. Originally, the force reduction structure can be used to absorb the extremely low frequency part, so that the frequency band that is processed will also change, which is highly undesirable.
Written at the end
The processing at the grassroots level has arrived here today. For the complete surface of the base layer, you can treat it as a normal home decoration. The paint is painted and the wallpaper is wallpapered. Next time, let's talk about the more common indoor acoustic treatment. More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), the country's most influential home theater audio player interactive media website.
Note: This article is transferred from HIFI. The article is an independent view of the author and does not represent the position of the home theater network.
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