Project Description
Auditorium Design for Acoustic Requirement
In all stadiums, the vast majority of auditorium design stadium is for comprehensive multi-purposes. In addition to sports competitions and training, it can also use for large-scale theatrical performances, conferences, fashion shows, film screenings and organizing acrobatics, circus performances. It is indeed multi-purpose auditorium. In order to meet the requirements of multi-purpose use of the auditorium design, it needs to do the professional acoustic solutions.
The most important feature of the stadium is its large volume, resulting in the long reverberation time in the hall.
- the long reverberation time will reduce the acoustic clarity of the hall, to influence the listening of the audience.
- the long reverberation time will also cause howl round of the sound-reinforcement system.
- the parallel walls and the long sound path in the competition pool will cause flutter echo and multi-echo.
- the sound of players’ footsteps and crash will be more intense; it even involved into a strong buzz.
- the structures of stadiums are more diversified, because the architects are not satisfied with rectangular design of the past.
- The stadiums are circular, elliptical, and polygonal, in an inexhaustible variety.
All these curved walls and vaulted roofs will produce sound focus.
sports architecture level
| Level | The main requirements |
| Top 1 level | Olympic Games, Asian Games and home to world-class competition |
| Top 2 level | National and international individual competitions organized |
| Top 3 level | Organizing regional and national individual competition |
| Top 4 level | Organize local, mass sports |
comprehensive multi-purposes auditorium 500～1000Hz reverberation time
| Level of stadium | volume（m3） reverberation time（s） | ||
| ＞80000 m3 | 40000～80000 m3 | ＜40000m3 | |
| Top 1,2 Level | 1.7 | 1.4 | 1.3 |
| Top 3 Level | 1.9 | 1.5 | 1.4 |
| Top 4 Level | 2.1 | 1.7 | 1.5 |
| Attention：Reverberation time changes from±0.15s. | |||
Swimming Pool competition hall 500～1000Hz reverberation time
| Swimming Pool Level | Volume（m3） Reverberation Time（s） | |
| 3/Seat | >25 m3/Seat | |
| Top 1, 2 Level | <2.0 | <2.5 |
| Top 3, 4 Level | <2.5 | <3.0 |
The special Gymnasium hall like hockey hall, skating hall, tennis hall and track and field hall can be designed its reverberation time as the swimming competition hall.
Specific Value of Frequency Reverberation Time and 500～1000Hz Reverberation Time
| Frequency（Hz） | 125 | 250 | 2000 | 4000 |
| specific value | 1.0～1.2 | 1.0～1.1 | 0.9～1.0 | 0.8～0.9 |
Gymnasium hall (room) noise limits
| Hall, Room Type | Auditorium Level and NRC | |
| Top 1 and 2 Level | Top 3 and 4 Level | |
| Competition Hall | NR-35 | NR-40 |
| VIP Lounge | NR-30 | NR-35 |
| Amplification Control Room | NR-35 | NR-40 |
| Commentator Room | NR-30 | NR-30 |
| Amplification Control Room | NR-30 | NR-30 |
Stadium Acoustic Design Recommendation
| The largest Sound stress（dB） | Sound Situation not uniformity（dB） | Amplification Control（dB） | Frequency（Hz） |
| ﹥90 | ﹤10 | ﹥10 | 100～1000 |
| Note：It can be changed according to different size of stadium. | |||