The so-called multi-function hall generally refers to an activity place with an area of not less than 200 square meters, which integrates functions such as meetings, small performances, film and television broadcasting, dance entertainment and karaoke. Although the hall area is small, in order to meet the above functions, besides reasonable equipment configuration, the modeling structure, material selection, decoration style and sound absorption material arrangement of the hall play a very important role in realizing the above functions.

The height of the hall is an elastic index, which varies with the size of the hall. The minimum standards are: 100 square meter is not less than 3 meters, 200 square meters is not less than 3.5 meters, 300 square meters is not less than 4 meters, and more than 400 square meters is not less than 4.5 meters. The height of the beam bottom can be reduced by about 0.5 meters.

The following points are for reference:

First, the size and geometry of the hall.

The influence of the size and geometry of the hall on the architectural acoustic environment is very obvious, and sometimes even decisive. In order to achieve the good effect of multi-function hall, the geometric shape of the hall is required to be rectangular and fan-shaped, not bell-shaped and round. Especially in some newly-built buildings, because of the designer's ingenuity, the multi-function hall is planned as a circle or polygon, emphasizing the shape and layout. As we all know, if the curved wall is not treated with acoustics, it is easy to produce acoustic focusing, which seriously affects the sound field distribution and destroys the auditory effect. In addition, irregular shapes such as bells and circles are not conducive to the layout of the stage and speakers. Of course, unless it is only used for meetings (such as round tables), tables and seats can be arranged in an arc shape, but the side walls should still be designed in an arc shape. For those rectangular and fan-shaped halls, the length-width ratio is generally required to be within (1-3): 1.

Due to the limitation of conditions, it is generally necessary to find professional and technical personnel to evaluate the irregular polygon hall on the spot and carefully design the environment and acoustics.

Second, the stage.

Considering that the multi-function hall should have the ability of small-scale performance and the layout of the conference podium, the stage is a necessary facility to be considered. There are many forms of stage, including traditional frame, flexible table, high table in the center and "T" shape. However, generally speaking, as a conference, performance, etc. The proposal still tends to the traditional framework style. This is conducive to meetings, film and television broadcasting, etc. The width of the platform mouth should generally be 2/3 of the hall width, the height of the platform mouth should generally be 1/2 of the platform mouth width, and the height of the platform lip (stage surface) should generally be 0.8- 1. 1 m.

Third, architectural acoustics treatment

In order to obtain the good effect of multi-function hall, besides optimizing and screening its shape, the acoustic structure modeling of its side wall can not be ignored. Under the current economic level, the following principles are given:

For halls with a floor area of 1. 100 square meters or less, the influence of architectural sound on electroacoustic system can be ignored in principle, and the structure and decoration materials can be flexibly mastered according to the decoration requirements.

2. For halls with an area of 100 m2 to 200 m2 or 500- 1000 m3, it is suggested that some side walls and all rear walls be slightly sound-absorbed, and the area can be controlled at about 20% of the side wall area of the hall, and materials with sound absorption coefficient of about 0.2, such as soft bags, should be selected.

3. For halls with an area of 200 square meters or more than 1 000 cubic meters, in addition to the requirements of Article 2, the area of sound-absorbing materials should be appropriately increased, and the sound absorption coefficient of the selected materials can be appropriately increased (for example, ultra-fine glass wool, the outer layer should be made of plates with a perforation rate of 8- 15%), and the structure should be designed and processed according to acoustic requirements. If it exceeds 2000 cubic meters, you can set the sound.