Design principles of sound engineering, sound room design requirements

1 The form of the sound control room.

There are two forms of sound control room:

1) Closed control room;

The enclosed sound control room is permanently located behind the side stage or auditorium. The advantage of being located in the background is that it is close to the stage, easy to contact, and the microphone connection line is short, but it is difficult to have a comprehensive view of the stage, especially if it cannot be tuned according to the sound in the direct listening hall (field). The advantage of the sound control room located at the back of the audience hall is that it can watch the whole stage, and can be tuned according to the sound size in the hall, but the disadvantage is that it is far away from the stage, the contact is inconvenient, it is not easy to see clearly, the microphone cable is longer, and the installation is more troublesome.

2) Open control room.

The open control room is usually located in the auditorium, and the equipment is placed directly on the cabinet and workbench instead of a computer room. The advantage is that it can be adjusted at any time according to the live acoustics. The disadvantage is that it is watched by the audience, and there is no good environment to speak of.

2 Sound Control Room Requirements.

1) The volume should be as large as possible.

If possible, the volume of the sound control room should be as large as possible. When recording, it is generally required that the recorder's room has a large volume to ensure the effect. The sound control room of the sound reinforcement system is no exception, and the volume should be as large as possible, and the sound control room should ensure the best effect, so that the sound controller can make a judgment according to the situation.

Generally, the minimum net area of the audio control room should be greater than 15m2, and the minimum size of width and height should be greater than 2 5m.

2) The observation window of the sound control room should be large enough to be able to view the rostrum and more than two-thirds of the performance area. The sound control room at the back of the auditorium should have an open window so that the sound in the hall can be heard directly. The window sill elevation should be about the same as the ground elevation of the last row so that the viewer does not obstruct the view.

The position of the observation window, the position of the mixer and the position of other equipment in the audio control room should be reasonable. Ideally, the sound controller can sit in the seat in front of the mixer, and see the inside of the venue through the viewing window, and look sideways to see all the equipment in the rack.

3) Keep away from the light control room.

In order to avoid the interference of strong electricity to weak electricity, the sound control room must be kept away from the lighting control room. After the location of the sound control room is determined, the position of the microphone socket junction box is determined, and the location of the speaker system is determined, the economic and reasonable sound reinforcement system pipeline design can be made according to the structure of the building and the avoidance of strong electrical interference.

4) Better acoustic environment.

The sound control room should also have a good acoustic environment to facilitate the first time, and it is best to hear the sound effect directly in the field. Flat ceilings and walls should be properly treated with sound absorption.

According to your requirements designed, renderings, system diagrams, installation roadmaps, etc

It should be closely cooperated with architectural acoustic design, architectural design and other related engineering design majors, and the position of the speaker system should be used as the main sound source point, and the reverberation time, reflection distribution and other problems should be solved one by one.

It should meet the provisions of the national standard "Optimal Matching Value for Interconnection of Sound System Equipment" GB T 14197 and "Performance Requirements for Electrical and Audio of Conference System" GB T 15381, and a balanced transmission mode should be adopted between system equipment; The digital transmission and interface shall meet the requirements of the relevant national industry standard "Multi-channel Audio Digital Serial Interface" GY T 187.

Complete drawings and explanatory documents should be provided. Including piping diagrams, design layout diagrams, system principle block diagrams and configuration and wiring diagrams.

The sound reinforcement system should not cause environmental noise pollution to the occupied areas outside the service area.

The number of microphones should be sufficient to meet the pickup of different types of sound sources, and in addition, if wired equipment is used, the signal wiring should be a shielded balanced cable.

The loudspeaker system must have reliable safety measures in place, and if it involves changes to the load-bearing structure, etc., the safety of the existing building structure must be re-checked by a qualified design unit.

The power loss between the power amplifier and the main speaker system should be less than 10% of the power of the main speaker system, and the power loss of the subwoofer system should be less than 5%.

Nowadays, a good bar must have excellent design, unique decoration, good lighting, sound effects and atmosphere.

The bar is generally composed of five functional areas: booths, high platforms, loose platforms, stages or dance floors, and DJ stations.

Booths: Somewhat similar to private rooms, they are generally distributed on both sides of the hall and form a semi-enclosed structure. There are sofas and tables inside, and the booths are prepared for a large group of customers, and there is a minimum cost.

Raised Desk: Distributed in front of or around the bar, the bar is the kind of bartender. The high platform is generally for guests who come alone.

Loose Stage: Generally distributed throughout the hall or around the dance floor. This type of table is generally used for 2 to 5 guests.

Stage Dance floor: The stage is generally dozens of centimeters higher than the hall, which is used to perform various programs and enhance the atmosphere of the bar; The dance floor is located in the lobby** and is mostly used for dancing guests.

When designing speakers, the first consideration is the use, for example, the audiophile level of listening, or the home theater of the first movie at home, or for business, or for general computers, etc., after having a clear use, it can be designed for different needs to withstand power, different sound quality performance, and even structure, appearance.

Since the speaker is making sound, it cannot be separated"The original sound is reproduced"Otherwise, the purpose of using speakers will be lost,Under actual conditions,Sometimes you will encounter the limitations of appearance,Size,Structure,Cost and other factors,This is the time to test the designer's skills,How to adjust the design in these limitations,Make the most suitable speaker,This is not an easy thing,Although there are some equipment,Software can assist; But in the end, it is still necessary to rely on the human ear to make judgments, after all, the sound quality is felt, so it cannot be quantified, so it is more necessary for the designer himself to have an aesthetic foundation.