Engineering Introduction:

Noise elimination in cinemas generally follows two ideas: first, eliminating noise sources; first, isolating noise. The way to eliminate noise sources is usually used to solve equipment noise. For example, the problem of an air conditioning unit can be properly adjusted to the theater or office area, which is not very sensitive to noise, or to do sound insulation and shock absorption. Isolation of noise is a more extensive and feasible method. It can be said that most of the processing is based on this idea. The ideal cinema's sound insulation treatment is, of course, to build a completely suspended space in the building space, that is, the overall floating structure. Although it is difficult to achieve this in cinemas, the sound insulation design of cinema should be aimed at blocking and reducing noise. The use of keel filled cotton, sound insulation felt and cavity can make the cinema achieve a suspension seal effect.            

The cinema decoration is the sound insulation effect of the cinema directly affecting the audience's enjoyment of the film, such as the bad sound insulation of the cinema, and the interference between the playback rooms. So what factors affect the sound insulation of cinema? How to do sound insulation when decorating the cinema?     

The wall part sound insulation processing of the cinema            

According to the requirements of different walls, a movie hall should use a variety of decorative and sound absorbing materials, and all kinds of materials have different sound absorption coefficient. There are two forms of sound absorption in the wall. One is to choose the sound absorbing material of the finished product. After the wall is made a good foundation, it is directly attached to the wall. One is the choice of the dragon bone to apply the sound absorbing material (such as the sound insulation cotton, etc.) to the wall, and then the cover surface of the flame retardant material.            

Sound insulation processing of theater doors and windows            

Most outdoor noises come indoors through doors and windows. The sound insulation door has good sound insulation effect. The sound insulation window can make the noise out of the outside. The sound barrier glass can be obstructed by double glazing, and the interference noise entering the room can be obviously reduced.   

Part sound insulation processing of the ceiling of the cinema            

The sound insulation of the ceiling should be determined according to the sound insulation property of the decorative materials and the environment space. Some of the ceiling use general decorative materials, such as paper surface, plasterboard, etc.; some use mineral wool sound absorption material; and the use of cotton plate and other materials cross the ceiling. The sound absorption performance of these materials is not the same, the position of the ceiling is different, some hanging top because of the high space reasons, close to the bottom of the beam; some of the top of the ceiling still has a certain height of space and so on, these reasons will also affect the specific sound absorption performance. Therefore, it is also necessary to determine the sound absorption coefficient according to the specific circumstances.