Ceiling speaker, wall speaker layout and installation

[Audio Network Information]

The layout of the entire sound reinforcement system is also very important, and the quality of the layout is directly related to the sound quality of the entire system.

1. Speaker layout principle

The arrangement of the speakers generally follows the following principles:

1) Make the sound field of the hall even;

2) The viewing direction is the same, and the sound is natural and natural;

3) It is advantageous to overcome feedback and improve sound transmission gain;

4) The line is simple, easy to repair, and adjust the coverage angle;

5) The sound emitted by the speaker is delayed by 5~30ms than the natural sound source;

6) Cover all auditoriums according to the speaker coverage angle (4 kHz, 8 kHz drop from 8 kHz).

2, the speaker layout

The speaker layout should be determined according to factors such as building function, body shape, space height and auditorium setting. It is generally divided into: distributed arrangement, centralized arrangement, and mixed arrangement.

1) Centralized

The speaker (or speaker system) should be in a centralized arrangement in the following cases;

(1) setting up the stage and requiring the same audiovisual effect;

(2) It is not suitable for the layout and construction restrictions.

When concentrated, the direct sound of the audience area can be made more uniform and the acoustic feedback can be minimized.

Centralized systems are centrally installed with a single speaker or a group of speakers.

For example, there is a stage-shaped hall, and the speaker system is close to the natural sound source, usually placed above the table or on both sides of the frame. The advantage of this arrangement is that the sound comes from the direction of the stage, and the sense of direction from the viewing is the same, and the hearing is more natural. The disadvantage is that the shape is complicated (such as the platform is too deep) or the large hall, the sound field is not easy to be uniform, the sound level to the back seat may be low, and the centralized arrangement is because the speaker is close to the microphone on the stage, which is easy to cause the feedback whistling.

It should be noted in engineering design that a single-directional speaker or sound column should be selected, which is advantageous for overcoming acoustic feedback. When the speaker is arranged above the table, it is better to overcome the effect of the acoustic feedback than to arrange it on both sides of the table. For the higher space height, the obvious problem is that the front row of listeners will feel the sound coming from the top of the head. In order to overcome this defect, an auxiliary speaker can be added to the mouth (the power of the speaker should be allocated less). The sound field in the front row is even, causing the sound to move down. When the speakers are arranged on both sides of the table, the problem of acoustic feedback is more prominent. Because the speakers and the sound column are relatively poor in directivity in the horizontal direction, simply hang two speakers of the same power on both sides of the table, to the hall. The central seat audience will have double source interference, and the audience is very uncomfortable. The solution to the problem is to hang the speaker as high as possible and increase the auxiliary speaker as appropriate. Others are halls with audiences on all sides, such as gymnasiums, and speakers are arranged in the center of the competition hall. Place the microphone's performance area and pay attention to controlling the directivity of the speaker. Due to the complexity and variety of the halls, the centralized system can be assembled with many speakers and arranged in curves of different shapes.

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