The quality of the audio-visual effects of the home audio-visual room directly depends on whether you have good audio-visual equipment and an excellent spatial audio-visual environment. The layout and decoration of the space structure, if handled properly, will greatly improve the audio-visual effect of your home audio-visual room. Today, I will share and discuss with you the relevant matters that must be paid attention to in the space layout and decoration of the home audio-visual room design.
15 square meters home video room design
There are many types of listening rooms, the most common are two: one is a professional monitoring room, which has a great impact on reverberation time, frequency response and even There are strict requirements for temperature, humidity, air pressure, etc.; the other is a home listening room that is also used as a living room in an ordinary family, mainly for listening to music. The International Electrotechnical Commission proposed a standard IEC29-B for a home listening room. and reverberation time (IKHZ is 0.4-0.65), etc. have recommended values.
However, the living conditions and economic ability of each family are different, the above values are for reference only and do not need to be copied. The basic requirements and construction methods of a general home listening room are described below for reference by qualified music lovers:
1. Select a room.
Two common room types are square and rectangular. The room chosen for the listening room should avoid squares as they tend to resonate, resulting in coloration and off-flavors. The listening room should preferably be rectangular, and the walls should be parallel and symmetrical, and there should be fewer doors and windows, so that it is more convenient to transform.
2. Pay attention to sound insulation.
In addition to general building materials, decorative materials that are both sound-absorbing and sound-insulating should also be used. If the partition wall is a 24-brick wall, the general sound insulation is sufficient. If it is a lightweight wall, a low-density gypsum board or cement fiber compression board (FC) separation wall can be added on the inside to improve its sound insulation capacity. In addition, the door panel should be made into a multi-layer composite sandwich door, the door seam should be made into an oblique opening, and a blanket or rubber strip should be added for sealing;
3. Pre-embedded wires.
Buried surround speaker wires and power cords, and surround speaker wires should be made of special-purpose wires with extremely low resistance, which should be pre-buried on both sides of the rear wall and positioned 60-100cm above the listener’s ears; power cords It should be thick, pre-buried at a height of 30cm from the ground, and the socket capacity should not be less than 10A.
4. Interior design.
For the concert hall, decorate the room into an “eight” shape, with a wide front and a narrow back. The ceiling is slightly inclined, the front is high and the back is low, and 50-80cm is left around, which is conducive to the sound from the surround speakers. Spreads throughout the room and is particularly effective at absorbing low frequencies. Indoor furniture and accessories should be simple and stable, and the carpet should be laid on the ground between the main speaker and the listener, which can play a strong finishing touch and make the sound effect more perfect. In short, when designing a listening room, we must give top priority to sound absorption and sound insulation, so as to create an ideal home listening environment.
Design plan of home video room 1. Suitable space size and environment
The ideal room area of video room should be more than 15 square meters, too small for audio-visual There will be a sense of depression, and there will be problems with equipment placement and viewing distance. The room should be rectangular, and the ratio of length, width and height also has certain requirements. The ideal ratio of length, width and height is 1.618:1:2.618. A suitable ratio can reduce the intensity of the standing waves in the middle and low frequencies. Of course, it is difficult to have such an ideal ratio in reality. Generally speaking, as long as the length, width and height are not divided by integers, it is good.
In addition to the right proportions, the room also has a hard tone and a soft tone. The hard walls of the room mainly reflect sound energy, which is a hard-adjusted space. Because the reflected sound waves are too strong, it will be noisy and harsh, and the low frequency will also be enhanced. The wall separated by wooden boards and gypsum boards, and the room with interlayer between the boards is called a soft-tuned space, which absorbs the sound energy of high frequency, medium frequency and low frequency to a certain extent, and the sound load is large. This kind of space occasionally causes a lack of low-frequency volume due to excessive absorption, but the high-frequency is very pleasant. The ideal audio-visual room should be a soft-tuned space.
Of course, whether it is a hard or soft room, in order to get the ideal sound field effect, it is necessary to do some necessary acoustic treatment for the room. Show the energy of the equipment as best as possible.
2. Acoustic treatment of the audio-visual room
The acoustic treatment of the audio-visual room is mainly two: reducing low-frequency standing waves and excessive reverberation reflections. The solution is to Place appropriate sound-absorbing materials.
Vibration-type sound-absorbing materials, such as brick walls, wooden boards, glass, etc., mostly absorb relatively low frequency bands such as below 500Hz, and porous materials, such as mineral wool foam, cloth, mostly absorb high absorption such as frequencies above 4000Hz. The amount of sound-absorbing material used in the space depends on the specific conditions of the room. The easiest way to know whether indoor sound-absorbing materials are suitable is to speak at a normal volume indoors. If you feel that your voice is rich, then the use of sound-absorbing materials is basically normal. On the other hand, if you feel that the sound is very short or even dry, or you need to be louder to maintain the original sense of hearing, it means that the sound-absorbing material is too much; Not enough sound-absorbing material.
It is not advisable to use only one type of sound-absorbing material in the listening space. There should be several different sound-absorbing materials, which can prevent a certain frequency from being absorbed too much and make the audible frequency range unbalanced.
Actually, the most effective way to reduce the medium and low frequency standing waves is to destroy the parallelism of the wall. It can not only effectively reduce the medium and low frequency standing waves, but also make the medium and high frequency sound waves diffuse, making the sound more natural.
3. Decoration of the walls
The walls of the listening room are generally decorated with the front wall being hard, the left and right side walls being sound-absorbing, and the rear wall being diffused. The left and right side walls are the first reflection places for the direct sound of the speakers, so they must be sound-absorbing, so that the sound image positioning is clear and the sound is clean, so as not to make the sound noisy. Rear Wall In most cases, in order not to absorb too much low frequency or overload the amplifier power, the rear wall of the speaker should be made solid and rigid, so that the low frequency can be “forced” forward for better extension. The corners, especially the corners of the back wall and the side walls of the speaker, are the places with the strongest standing waves. If it can be handled a little, it will be of great help to the sound.
4. Decoration of the floor and ceiling
The wooden floor is most conducive to the sound. If it is a tile floor, a thick carpet should be placed on it. The way to determine the position of the carpet is to let the carpet be in the speaker. Move between the listening positions and always find the place where the high frequencies are least noisy. In addition, ceiling sound absorption can be used. It is best for the ceiling to have both sound absorption and diffusion, otherwise only hard-tone diffusion or all soft-tone sound absorption will make the high-frequency reflection sound too strong or too weak.
5. Treatment of doors and windows
A good audio-visual room should have a certain sound insulation function to prevent the outdoor noise from entering the room, or prevent the indoor sound from being transmitted to the outside. others. The doors and windows used in the audio-visual room are required to have certain sound insulation and sound absorption functions. Because the heavier the object, the better the sound insulation, so the door should be as thick as possible. There are two types of windows: fixed and movable. The tightness of the fixed window is the best, and the effect is also the best. In addition, you can also consider using more expensive double-layer insulating glass sound insulation windows to improve the sound insulation performance. In order to improve the sealing performance of doors and windows, after the doors and windows are treated, heavy fabrics should be hung on the doors and windows to reduce the transmission intensity of sound waves.
Home video room design considerations 1, floor: Tile, stone: It is easy to cause high frequency harshness.
Wooden floor:
1. Lay the wood plank directly on the cement floor, the sound effect is similar to that of the tile floor
2. Nail the wood floor overhead to form a cavity, It will have a good absorption capacity for frequencies below 100Hz, and the low-frequency effect of the sound will be very good. If you can lay small stones under the floor, it can fill the gap that is easy to cause standing waves and resonance, and even the drawbacks of cavity wood floors can be overcome.
3. The ground is made of wooden keel base with a height of 50-100mm, and the hollow layer can be filled with soft materials, but pay attention to water discharge treatment, and lay cork floor on the keel surface (at the same time, the sound absorption effect of the room is strengthened) ;
2, Wall: “Hard front wall, left and right side walls sound absorption, rear wall diffuse”
1. Front wall: To make it hard, you can save a certain amount of low frequency, so that the low frequency can be better extended forward.
2. Sound absorption on the left and right side walls: ensure clear sound positioning and pure sound quality
3. Back wall: It can be processed into sound absorption and diffusion. However, it is recommended that the seat should be more than 0.6m away from the rear wall, and the sound-absorbing material should be pasted on the diffuser plate, so that both sound absorption and diffusion can be achieved.
4. Corner: It is the place with the strongest standing waves, and placing bookshelves, CD racks and other features in the corner of the floor can greatly help the sound
5. The wall adopts Wood sound-absorbing panel surface layer, laying 50mm polyester fiber sound-absorbing cotton on the back, and reserving 50mm air layer
3, ceiling: best It has both sound absorption and diffusion functions
1. Light steel frame and mineral fiber board: it is very effective in resisting excessive indoor reverberation, but it has no diffusion function;
2. Adopt Small arc panel: Paste PVC paper on the downward side of the arc, and stick sound-absorbing cotton on the concave side. This design not only has the functions of absorption and diffusion, but also does not form a cavity for absorbing medium and low frequencies;
3. It adopts the design of small arc panel and surface stretch cloth, which is both beautiful and practical.
4. Cover the top of the ceiling with sound-absorbing foam and fix it with wooden strips. The pipes can be passed through the ceiling.
5. Due to the low floor height of ordinary residential buildings, the ceiling part adopts the interior design method, but it should be noted that any rigid connection with the structure must be isolated by vibration damping materials such as rubber pads.
4, door: must have certain sound insulation and sound absorption function
1. Increase the weight and thickness of the door, also It is possible to fill the middle of the double door with sound absorbing material.
2. Paste the sealing tape on the door seam.
3. The density of common wooden facades is calculated as 11kg/㎡, and the sound insulation is about 27dB. If the door seam is not specially treated, the sound insulation is only about 15dB.
4. Change the door body to a sound insulation door with higher sound insulation, and strengthen the sealing measures for the door seam. This solution ensures the sound insulation of the door, but there will be the problem that the door body is too heavy and it is not easy to open.
5. Adopt “sound gate” double-layer sound insulation door. That is, the wall is thickened, and two wooden doors are set inside and outside, which is equivalent to a two-story door and an air spring is added, which will make up for the low sound insulation caused by the lack of quality of the wooden door. The two wooden doors can be made by using multiple layers of plates with different thicknesses and filling the door cavity with soft sound-absorbing materials. In order to avoid the coincidence effect, damping materials (such as asphalt paint, fiber spray material) to suppress the resonance of the plate. In this way, the sound insulation is greatly improved under the condition of ensuring the overall decorative appearance.
5. windows
1. Block directly with brickwork. This method has the best sound insulation, artificial lighting can be used for insufficient lighting, and air-conditioning system can be used for ventilation;
2. The windows are transformed into two- or even three-layer glass windows, and the glass and the frame are reused Rubber strip connection.
3. Window seam with sealant strips
6, curtains
The audio-visual room should be installed with dark heavy curtains or blackout type shutters.
7, other matters
1. Pipe hole: sound insulation treatment
2. Sound absorption material: wall covering, carpet
p>
3. Bookshelf: Place books and CDs. These items are absorbing and reflecting sound waves, which can improve the listening effect.
4. Vibration reduction treatment of audio equipment: In order to avoid structural sound transmission, vibration reduction measures must be adopted for ground and hanging speakers. A spring hanger shock absorber is installed on the upper end of the hanging speaker, and the ground speaker should have an independent base (or a certain thickness of vibration damping pad should be added later, but the effect may be limited)
