In the device wire this piece needs to roughly consider the home theater including:
1, display equipment: high-definition projection, high-definition LCD or plasma TV;
2, the playback device: Blu-ray player, HD player or Sony PS3 can be;
3, power amplifier: It is best to support HDMI's next-generation AV support 5.1 or 7.1 power amplifier; can transmit video through the power amplifier, decode the amplified audio to the speaker;
4, speaker: buy 5.1 or 7.1 speakers and subwoofer, it is best to combine power amplifier power at the same time; power amplifier and speaker to coordinate with;
5, connect the wire, according to your equipment selection. For example, speaker cable, HDMI, fiber, coaxial, color difference, AV and other wires.
First, power and wiring need to be foreseen. The audio-visual room has higher requirements on the power supply. It is best to take a few wires directly from the incoming line. In the audio-visual room, the power supply directly connected to the power circuit is completely separated from the other power supply circuits. The wiring in the power supply box should be separated from the outgoing line, and separated according to the direction and current, and fixed in rectangular shape. In order to make the room of the audio-visual room neat and tidy, it is convenient to install and operate in the future. It is necessary to pre-bury the pipeline and port on the six-sided wall during the decoration. When the line is pre-buried, the special signal line should be wrapped with PVC pipe, and the wires should be separately routed to prevent the power interference generated by other electrical appliances on the audio equipment. The quality requirements of various wires are too good, and the shielding is better. The audio-visual room of our home is considered to be isolated from other wires when laying the power cord. The power cable is buried in the wall through the iron pipe to shield it. Otherwise, it will Become an antenna and send all kinds of electric waves in the air to the amplifier and speakers. Because high-grade wire is expensive, consumers can also choose second-hand brand-name lines, which are very value-for-money.
The second step is a very critical acoustic space configuration. Whether you have a big villa or a small apartment, you only need a rectangular space of at least 4m x 5m, about 20~30m2, which is planned as a video room. Walls, ceilings, floors, doors and windows need special treatment to create a relatively confined space. Many people know that the principle of “pre-hardening and then diffusing†means that the front wall is not treated, the walls on the middle side are treated with sound absorption, and the sound on the back wall is diffused, but in fact, the front wall of some spaces is not treated, and the reflection Spreading will make the sound lose its sense of hierarchy. A thin tapestry can be placed on the upper part of the wall to increase the interfacial damping of the wall to absorb the high frequency of the part. The lower half can be designed as a secondary residual diffusion system and a low frequency common shock solution system. The secondary residual diffusion system is glued to the wall skirt by 2CM, 4CM, 6CM thick wood strips and then fixed on the wall skirt, which is mainly used to diffuse one reflection wave and increase the diffusion effect. The low-frequency absorption system is fixed on the wall with 5.5CM thick wooden keel, then inserted into the glass sound-absorbing cotton, and then sealed with a 5MM thick splint. The mechanical energy is converted into heat energy by the principle of thin plate vibration, which is mainly used to resolve the low-frequency co-seismic. . At the corner of the wall, a circular diffuser is also produced by the principle of thin plate vibration and arc diffusion, which is used to eliminate the low frequency standing wave at the corner.
The ceiling is best equipped with both sound absorption and diffusion. There are three ways to recommend the ceiling: one is the light steel frame plus the mineral fiber board, which is effective for suppressing excessive indoor reverberation, but has no diffusion function; the second is the small piece. The arc panel is affixed with PVC paper on the downward side of the arc piece, and the concave side is glued with sound absorbing cotton. This design not only has the function of absorbing and diffusing, but also does not form a cavity for absorbing low and medium frequencies; The design of the small arc panel and the outer stretcher is both beautiful and practical. There are also enthusiasts who are covered with sound-absorbing cotton on the ceiling of the ceiling and fixed with wooden strips. The pipeline can pass through the ceiling. In addition, ceiling lamps should be installed instead of fluorescent lamps, as the latter's ballast hum can cause noise interference in the listening environment.
The basic requirements of doors and windows are to have a certain sound insulation and sound absorption function. You can increase the weight and thickness of the door, or make the door hollow, and the interlayer is filled with soundproofing materials. Many friends use foam or sponge to be environmentally friendly. Not in line with fire safety, there are now some new types of soundproofing materials, which look like plastic foam, but made of soybeans and corn, which meets environmental standards and can effectively control the sound absorption rate. A soft sound absorbing material can also be applied to the door panel to further provide sound insulation. Some music enthusiasts even completely seal the windows, and the general home audio and video room does not need to be done to the extreme, the windows are transformed into two or even three layers, and the glass and the frame are connected by rubber strips. The dark velvet curtains have achieved the effect. In the door seams and window joints, the sealing strip can be said to be the easiest way to sound insulation.
The floor is preferably wood. The wooden floor is nailed into a cavity, which will have a good absorption capacity below 100Hz. The low frequency effect of the sound will be very good. If you can put pebbles or cement under the floor, you can fill the gap that easily causes standing waves and resonance, and it is a shock to the speaker.
Don't think that the design of the studio is mainly for sound absorption. In fact, too much sound will make the sound become dead. Usually, the area of ​​the sound absorbing material reaches 30% of the floor area, and it will feel very comfortable when listening to music. If you reach 60% of the floor area, you will reach the level of the listening room. In this space, you can even hear the difference between the music version--the front-page recording or the second edition three-version; if it reaches 90%, then Can be used as a recording studio. The sound absorption area of ​​the ordinary home audio and video room is 30%, for example, the space of 35 square meters, the sound absorption area is 10 to 15 square meters. If you want the studio to be more professional and perfect, you can simulate some out-of-the-box sound effects by using a diffusing tool on the wall behind the listening position.
The final step is the creation of a visual environment. The more expensive the projector is now, the higher the brightness of the picture, and the higher the requirements for the surrounding environment. The color of the entire studio should be as dark as possible, avoiding reflective materials as much as possible to improve the contrast of the picture. After the left and right walls are equipped with sound absorbing materials, you can consider wrapping them with dark velvet cloth, or hanging a thick curtain behind the speakers. In addition to sound absorption, it will give people a feeling of facing the stage. The ceiling is also best painted. Dark.
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