How to describe the characteristics of the bird's nest requires two characteristics.

1. The design of the Bird's Nest fully embodies humanistic care. Bowl-shaped seats surround the folding structure of the stadium, and the upper and lower floors are staggered. No matter where the spectators sit, the line-of-sight distance from the center of the stadium is about140m.

2. Three layers of "special devices", such as the sound-absorbing film material used in the lower membrane of the Bird's Nest, the sound-absorbing material set on the steel structure members and the electroacoustic amplification system used in the stadium, make the speech intelligibility index in the Bird's Nest reach 0.6, and ensure that the audience sitting in any position can clearly hear the broadcast. ?

3. The designer of the "Bird's Nest" also used the fluid mechanics design to simulate the natural ventilation of 9 1000 people watching the game at the same time, so that all the spectators can enjoy the same natural light and natural ventilation.

Extended data

Related background:

As the main stadium of Beijing Olympic Games, the "Bird's Nest" will become one of the landmark buildings in Beijing, and will become a hot spot for people to visit and travel for a long time. At the same time, in terms of design and construction, the "Bird's Nest" can not only undertake the opening and closing ceremonies and sports competitions, but also meet various needs such as fitness, business, exhibitions and performances, laying a solid foundation for the successful implementation of "post-Olympic development".

The National Stadium Design Outline requires that the design of the National Stadium should fully reflect the idea of sustainable development, adopt the world's advanced and feasible environmental protection technologies and building materials, and make maximum use of natural ventilation and natural lighting.

In terms of energy and resource conservation, solid waste treatment, electromagnetic radiation and light pollution protection, and the application of ozone-depleting substances (ODS) substitute products, it meets the requirements of environmental protection guidelines for Olympic projects, and some of them are required to reach the international advanced level and set an environmental protection model.

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