The main problems in the acoustic design of stadiums are: multiple echoes, serious sound overflow (disturbing), and many local quiet areas (sound blind areas), etc., and the design needs to be solved through acoustic construction and electro-acoustic coordination.

The multiple echo problem can be solved in two ways.

1. In terms of architectural acoustics design, it is necessary to add some sound-absorbing and reflecting surfaces to shorten the propagation of sound in space as much as possible, improve sound-absorbing efficiency, reduce reflected sound energy, avoid repeated reflection of high-energy sound waves and expand the reverberation radius. public broadcasting manufacturers

2. In terms of electro-acoustic design, speakers with high directivity factor (Q value) and narrow directivity should be selected, such as Q125, whose horizontal directivity is 60-90 or even 40-20. The attenuation slope outside the passband is greater than 60-90, and the sound energy outside the passband is relatively low

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It is also necessary to correctly design and adjust the coverage of the speakers, and control the frequency bandwidth of low-frequency sounds, which can also play a certain role. Note that the narrower the speaker directivity, the higher the cost

The use of low-power distributed speakers to supplement the sound can solve the problem of the local quiet zone (sound dead zone). Some issues worthy of attention in the acoustic design of stadiums are: if there are many structures and walls, such as ellipses or arcs with larger major and minor axes, circles or arcs with larger diameters, large columns, echo walls, etc. It is easy to bring the consequences of sound focus crawling, cause serious sound defects, damage sound quality, and reduce speech intelligibility. To some extent, this is the contradiction between design and aesthetic design, which needs attention and reasonable coordination in the design process. Public broadcasting brand manufacturers

Sound arrangement of sound reinforcement system in sound engineering

In the table, the stadium does not need to invest a lot of money to ensure accurate audiovisual positioning, as long as the basic sound requirements are good speech intelligibility and even sound coverage. In the decentralized sound reinforcement method, the sound comes from two or more directions, and the time difference is large. It is necessary to control the sound interference in adjacent areas, so that the speaker system covers a reasonable area without affecting the clarity of the sound. Speakers should not be placed opposite each other to avoid a comb effect. Directivity requirements of speakers; high appearance, high sensitivity, and strong sound transmission ability.

Sound engineering design scheme of sports venues

The basic structure of the stadium is open, semi-open and closed. Under normal circumstances, there is no multi-purpose hall under the seats, which is called a stadium. Sports venues can be divided into multi-purpose sports venues and dedicated sports venues. Most of the existing sports venues in my country are multi-functional gymnasiums, which are suitable for various sports competitions and ordinary theater performances.

The special stadium for sound engineering is designed and constructed according to the characteristics of specific sports, and is only suitable for specific sports events, such as football fields, tennis courts, etc.