Sound design for report hall

With the development of computer skills, video skills and network skills, the function of modern presentation hall has been fully expanded, and its performance methods are increasingly rich. It not only satisfies the function of meeting and presentation, but also satisfies people's inductive function of showing, commenting, academic exchanges and entertainment through various means and media. Then it arrives at the intention of building the presentation hall and improves its existing value and social benefits.

1. The functional orientation of the presentation hall

With regard to the present situation and prevailing trend of multi function presentations, we believe that the functional requirements of the office are:

1) be satisfied with various conferences and special academic presentations.

2) able to hold video conferencing, with the function of uploading and downloading live audio and video signals.

3) satisfied with small cultural activities and small studio activities.

4) capable of screening digital films, various materials, popular science films and high-definition TV shows.

5) refute the computer VGA signal for multimedia application.

6) simultaneous interpretation system with two basic languages.

Two. The layout plan of the lecture hall.

In view of the function of the above hall, we advocate the general layout of the presentation hall as follows:

1. the shape of the whole hall should be rectangular or near the rectangle fan.

2. expand the stage to reach the depth of 6-8 meters and set up the stage.

3. set up a VIP lounge at the counter.

4. the front row can be equipped with a small table to facilitate participants to record, read and place laptops.

5. set up a speech and comment system on the rostrum for experts and leaders to ask questions and comment impromptu.

6. taking into account the movie screening and small-scale studio activities, the presentation hall will be upgraded step by step.

7. the row spacing of the front row seats should be 1.30 meters, and the tables and chairs can be assembled in a movable way. At that time, it can be used as an interactive area for activities and games.

8. Considering the functional requirements above the presentation hall, the whole hall must be acoustically processed. The reverberation time is controlled at about 1S and the sound field uniformity is less than 3 dB.

The 9. sound control room, the light control room and the projection room are arranged on the two floor of the rear wall of the presentation hall.

Three, presentation hall equipment and equipment

To satisfy the functions of the hall, equipment must be equipped. Its principles are: saving capital, satisfaction, practicality and moderate advance. Based on this, the hall weak current system can be divided into: 1) sound reinforcement system 2) stage lighting system 3) video system 4) digital conference system 5) multimedia logic control system. The following is clear:

(1) sound reinforcement system

The sound reinforcement system is the most fundamental system of the presentation hall. The system takes the mixer as the center, divides the source and pickup, enlarges the signal processing, and restores signals.

Signal sources include DVD, MD, tape recorder, computer, cable television, digital movies and various types of microphones (gooseneck conference microphone, hand-held, wearable, clip-type wireless phone number) pick up audio signals. These signals are sent to the signal processing system by the main channel and auxiliary feed after the mixer is controlled and mixed.

In order to add system reliability and simplify the system composition, the sound processor (or media matrix) which integrates equalization, function, delay, frequency division, voltage limit and other functions is often used. It is convenient and intuitive to set it up by software.

The sound reduction system is mainly based on the channel and its channel amplifying through the amplifier and then playing through the speakers. According to the function of the aforementioned presentation hall, the sound reinforcement system is divided into the main channel, the return channel and the auxiliary environment sound channel, during which the main channel is divided into high-frequency and low-frequency speakers. In order to save money, the stereo sound of digital cinema can be compatible with the sound reinforcement system after skill processing.

The choice of microphone depends on the need to choose movable coil type, capacitive type of wired or wireless, mixing station should choose 16 (or more) with 4-6 grouping, speakers should be equipped with full-frequency speakers, subwoofers, hearing-back speakers and environmental sound box. According to the budget, the total power supply of the hall amplifier system should make the maximum sound pressure level reach 110dB.

(two) stage lighting system

Considering the operational power of the Statement Hall, after determining the aforementioned functional orientation, the commonly used stage lights should be equipped. There are basic lights, slap, top light, side light and so on. Lamps and lanterns mainly include backlight, spotlight, astigmatic lamp, computer lamp and so on.

There are no less than 70 lights in the power supply circuit, and there are no less than 40 direct control loops, and the capacity of each loop is 3KW. The power supply capacity of the whole hall should be no less than 300KW. Decorative planning should consider surface bridge and ear room.

For the sake of solemnity, the stage method is framed by a mirror. Generally, the opening is 10 meters wide, 6 meters high, and the stage is 0.8 meters high. There are electric curtain and two acts. The curtain is made of gold velvet, besides eaves and curtains. Set up 6 hangers, with 4 light hangers and manual electric.

(three) video system

Video system mainly includes a variety of video signals: DVD machine, digital camera, computer VGA signal, digital movie video signal, digital television signal, video display platform and other video equipment, these signals are selected and switched, sent to a digital projector for large screen display, but also can be sent to a general projector, two in the port. The rear projection appears.

Video system restoration should have the functions of collecting, transmitting, distributing, switching and recording video signals on the spot. For this reason, color cameras are equipped in the presentation hall to collect and monitor drawings in an all-round and automatic way, and modifying machines are equipped in the control room.

Here is an introduction to digital cinema and digital projector. Digital cinema is TI's 10 years of research and development, and entered the commercial sector in 1998. Our country was the earliest in 1999.