Everyone knows that the effect of home theater is not only dependent on the quality of the equipment, but the overall environment of the audio-visual room has a considerable impact on the effect. Before we also introduced the precautions for home theater decoration, "small room home theater" Acoustic decoration design notes, the old snail editor also shared this experience: "Old snail: talk about home theater decoration acoustic treatment of that thing", it is worth reading carefully, today Xiaobian said home theater Three elements of "empty black":
“Empty†means that in addition to the necessary supplies and seats in the room, others should not be placed as much as possible, so that when the room is limited in size, the room can be enlarged to facilitate the creation of a grand sound field and interference with the viewer. Sight.
“Static†refers to the intrusion of various sounds or noises that should be isolated from the outdoors as much as possible. At the same time, there should be no extraneous sounds in the room, so as not to interfere with the sound reproduction effect, and ensure that the viewers concentrate on watching the movie.
“Empty†and “Quiet†are mainly for the listening environment, while “Black†is for the lighting environment.
The dark environment is conducive to reproduce the details and vivid colors of the image under low light conditions. If the room is too bright, the color brightness and color saturation have to be adjusted to a large extent, which has a certain influence on the sharpness and contrast of the color TV image, and the image often appears white. Therefore, the indoor lighting of the home theater is better, which is closer to the actual cinema. This is why TV studios are always bright, and dim indoor light makes low-light video monitors (which have the correct color than home TVs) work properly. However, it is not necessary for home theaters. Creating a completely dark environment, moderately dim ambient light will help to enhance the appreciation of home theater. So, what kind of ambient light is appropriate? You can judge this way: even if your eyes are completely adapted to the environment, you can't see the words in the book within the normal reading distance. If you can make a quantitative measurement of brightness, you should ensure that the ambient brightness does not exceed 10% of the brightness of the TV screen. In fact, for our most commonly used direct view picture tube TV, the requirements are not so strict, as long as the TV light is not overwhelmed by ambient light.
Under normal circumstances, it is recommended that in the home theater room, except for a low-illumination light of 15W or less installed on the side of the projection screen (as far as possible from each other), there should be no other direct illumination. The position of the illuminator should be chosen so that its light is not reflected on the screen. In addition, try to isolate the interference of external light.
Why is the viewing environment in the cinema all black, but not in the home theater? The reason is very simple. The screen of the movie is larger than the viewer's perspective, while the ordinary CRT TV is less shielded than the viewer's field of view, so there must be a transition between the bright TV screen and the dark background. The eyes are not too tight, and it is not easy to fatigue when viewed for a long time, and it is also advantageous for obtaining the best color resolution. For this reason, for the front projection of the large screen, there is no need to do this. On the contrary, using the all black environment is conducive to improving its contrast. For high definition television or multimedia computer, because the picture clarity is high, the audience sits off. The screen is close, the TV screen will be full of view, and there is no need to set "backlight".
What kind of lighting source is used for lighting in the room? The lighting sources used in our family rooms are mainly incandescent lamps and fluorescent lamps (also called fluorescent lamps). Among them, the spectral distribution of the fluorescent lamp is relatively close to the spectral distribution of the television screen, that is, the color temperature is easy to reach 6500K, generally between 5000K-7500K; and the incandescent lamp has a low color temperature, usually around 3000K. The light source should also take into account the effects of its color temperature. When the color temperature of the light source is low, the light color appears dark, resulting in a warm, cheerful, and stable atmosphere.
Lighting is best not to use scattering, but to use projection. There are a number of downlights on the edge of the ceiling, and the type and color of the downlights are self-determined. The surrounding walls are provided with fancy wall lamps in appropriate positions. The number can be selected between 1 and 2 depending on the size of the room. A movable floor lamp can be set at the corner or in the appropriate position, and 1 or 2 sets of fluorescent lamps can be set. Wall light can also be embedded in the ceiling. A better way is to shoot the fluorescence on the projection screen and the edge of the surrounding wall, and shoot it at the back wall. The light intensity of the fluorescent lamp should not be too large, and its wattage can be determined according to the foregoing principles. When using fluorescent lamps, pay attention to the purchase of high-quality brands, especially to avoid the noise of the ballast's humming sound in the listening environment. More home theater knowledge, welcome to pay attention to the home theater network official WeChat: cnhifi.
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