1. Door and window treatment The purpose of door and window is to separate sound, absorb sound and dust.
A lot of noise enters the room through doors and windows. Good wooden door, the indoor noise level can be reduced after shutting down (10-20) db. If the door frame is covered with sealing strips, the noise level can be reduced (14-18). If the outdoor sound is noisy, it is recommended. Install double-glazed windows. Generally, the width of the living room window sill is about (12-15) cm, and a glass window can be added to the edge of the window sill to protect against dust, noise and warmth. Double-glazed windows reduce outdoor noise (14-18) db; if covered with a sealing strip, it can be lowered (18-20)dB. If possible, aluminum window can be installed to make push-pull type, saving space. It is easy to use, not easy to deform, and has good sealing performance, and its performance is superior to steel windows. China Home Theater Network
If the air conditioner is installed in the home, the air conditioning duct is the inlet air outlet and the noise inlet; if the TV room antenna is installed, the antenna inlet is also the noise entrance. These pipes should be silenced with extreme interfaces.
Curtains, curtains and tapestries are important sound absorbers, and they are more delicate and luxurious decorations. The use of velvet and velvet as curtain material and curtain material can reduce the reflection of sound waves and the resonance of glass windows. The sound absorption coefficient of the curtain made of velveteen is 0.31-0.47, the sound absorption coefficient of the curtain made of medium and long fiber is 0.15-0.27, and the sound absorption coefficient of the double velvet is the largest, which can reach 0.69-0.82. The treatment should be performed on the ground for sound insulation and sound absorption. It is best to lay a carpet, which is ideal for sound absorption and sound insulation. Generally, ordinary Hua fiber carpets are about 0.5-0.71, and the sound absorption coefficient of real wool carpets is about 0.68-0.82. It is better to set up wooden floors, and it is also possible to change the wood strips if conditions are limited. The sound absorption coefficient of wooden floors is about 0.03 - 0.05. Sometimes people are willing to lay plastic bricks or tiles, their sound absorption and sound insulation performance is poor, the sound absorption coefficient of plastic floor is 0.02 = -0.04, terrazzo scene sound absorption The coefficient is about 0.01-0.03. The sound absorption coefficient of the imported polyester fiber sound absorbing panels in Korea is as high as 0.8-1.10.
The ceiling is also an important way to introduce noise. Those with poor quality and thin slab ceilings are easy to transmit the roof, beautiful and soundproof, with little impact on the height of the room.
Also deal with the four walls. Ordinary walls are dry plastered brick walls, which have a small sound absorption coefficient of about 0.02 - 0.04 to make four walls into wooden walls; or to make wooden wall skirts with a height of (0.8 - 1) m, wall skirts Keep a certain distance from the wall, not less than 4cm, form a cavity between the walls, which can increase the low-frequency sound absorption effect. There are many kinds of concrete wall skirts. Users can also create new ones. If you can change the wall into a wave, arc, patch, etc., you can improve the acoustics in the interior. condition.
Usually the walls are white or sprayed with ash, spray paint, color spray or other paints, and their sound absorption effect is similar. If you have the conditions, you can wear the decorative cloth on the wall. The wall cloth is suitable for the wall (3-5) cm. This kind of wall cloth can enhance the sound absorption and beautify the living room. Or the imported polyester fiber sound absorbing panels are the best.
3, the furnishings of indoor furniture (1) typical data Many home listening rooms can enjoy music, but also can receive guests, to achieve the unification of audio-visual enjoyment and aesthetics. At present, the height of the ordinary room is relatively low, only (2.4-2.8) m. In order to balance the listening effect, the length and width should be close to 1.7:1. Generally, the area of ​​the listening room is more than 15 square meters, so that when the stereo is reproduced, the distance between the two speakers is about (2-2.5) m, which is advantageous for expanding the stereo image group.
(2) Display skills The placement of indoor furniture should strive to be convenient to use and elegant in the living room. When placing furniture, try not to take a symmetrical shape to prevent acoustic dyeing. Do not place objects that cause vibration, such as metal paintings, thin and light shells, etc., and their vibration will affect the sound reproduction effect.
The combination of cabinets, bedroom cabinets, large sofas, etc. in the room is very effective in improving the sound absorption effect, especially for improving the low frequency effect. The perforated plate resonator cannot be installed in the general room, so it is not convenient to absorb the low frequency. This shortcoming can be overcome after placing the wardrobe.
Acoustic conditions can be improved by hanging thick curtains on glass windows, wall hangings, carpets on the floor, bedspreads on the bed, etc. The curtains have better transmission performance to low frequencies, while the glass windows have better sound absorption performance for low frequencies, and they have complementary functions.
(3) Reverberation time fine-tuning indoor reverberation time should be controlled within a certain range. If the reverberation time is too long, the sound has tailing, echo, and the sound absorption can be increased by laying carpets, hanging decorative curtains, etc., and even indoor furnishings, dolls, velvet toys, flower pots, etc., can improve the sound absorption effect. If the indoor reverberation time is too short and the sound is dry, the reflective surface should be added, and the glass mirror and the picture of the large glass frame can be hung to improve the sound quality of the room.
There are still many ways to improve the sound quality. For example, indoor hanging various chandeliers, wall-mounted stickers or hanging crafts, etc., not only beautify the environment, but also improve the reflection characteristics. Some enthusiasts have placed bookshelves indoors, and bookshelves are filled with books and magazines of different sizes, CDs, and analog records. These items are absorbent, reflective, and dispersive to sound waves; The layers are protected by books of different sizes and widths, which can produce irregular surfaces. For large-area reflective walls that are difficult to handle, try to place the bookshelf and improve the listening experience. In short, through various adjustment measures, people finally hear the sound of the speaker sounding harmonious.
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