KTV decoration in the problem is a very complex, he involves the building, structure, acoustics, ventilation, heating, fire, lighting, audio, video and so on, but also involves the safety, practicality, environmental protection, culture (decoration) and other aspects of the problem. Karaoke decoration styles vary from country to country, our country is the world's largest karaoke country, seen and heard the decoration styles are different, but there is a general problem of poor acoustics, decoration of particularly luxurious KTV we go to sing the same acoustic defects, the feeling is that the singing is very hard (meaning that the sound system is very good case) or there is the phenomenon of acoustic coloring. Some places are crosstalk phenomenon is serious, multi-room singing concert hall has become a "toad pit". Serious KTV venues have become a sound pollution, the birthplace of noise. Investors from the heart is not willing to such things happen, because it will affect their business after all. As an audio worker we are very concerned about this aspect of the problem, some of our experts in Beijing to serve as a consultant for the design of some entertainment venues (acoustics or sound), does play a very good role. Here are some common sense issues discussed as follows.

One, the room's sound insulation:

Sound insulation is the best way to solve the "crosstalk", theoretically speaking, the higher the hardness of the material, the better the sound insulation effect. The most common decoration method is light steel keel gypsum board partition wall, although the center into the sound-absorbing cotton but because of the quality is not enough, the sound insulation effect is very poor. Most of the KTVs in Beijing use this method of decoration, and the sound insulation effect is very poor. Beijing Fangzhuang area is being renovated KTV also used this method of decoration, in the test of the effect of audio equipment crosstalk phenomenon is serious, the investor has no choice but to hire acoustic experts to study the revised program, would have been able to open a few days ago can only be postponed, the time delay to the investor has caused incalculable economic losses. So it is recommended that those who are ready to renovate the karaoke entertainment venues must be considered before the renovation of the room sound insulation.

So what is the best material that should be used for soundproof walls?

The economical and practical first choice is a 2/4 red brick wall with cement walls on both sides. This partition wall must be built to the top, the need to take the ventilation pipe or other alignment and then punched through, should pay attention to the sealing of the pipeline, otherwise the same can cause crosstalk phenomenon. Secondly, soundproof wall panels, this material belongs to the professional soundproof material, the two sides are metal plates in the middle of the foam plastic with sound insulation, the greater the thickness of this wall panel the better the sound insulation effect. Some places due to the weight of the problem, can not use the brick wall or other masonry wall approach, can only use light steel keel gypsum board approach, our proposal is to add a layer of high hardness of cement board outside the gypsum board, the appearance of this cement board and gypsum board is the same (the size of the same), but the hardness is much higher than the gypsum board, it is a very good acoustic material, it should pay attention to is the problem of the construction process, especially the part of the gap must be soundproof, the wall board is very good. Especially the part of the gap must be sealed.

Checking the sound insulation effect is a normal room to play music, in the doorway one meter to measure the degree of sound attenuation, such as sound pressure level in the room is 90 dB, the room outside the measurement of the sound pressure level of one meter is 60 dB, which means that the sound insulation of 30 dB.

The treatment of the door of the room is the same decoration design is more difficult to design the problem, the treatment of the door of the studio is a professional, but the sound insulation effect is very good, but the sound insulation effect is very good, but the door of the studio is very difficult to design. Currently more practical is the use of molding one door, the big door side with the seal approach, with the door closer sound insulation effect is good (relative to the ordinary door).