Specification for Acoustic Characteristics of Sports Venues.Bar bar sound Processor

　　1. The Regulations for Acoustic Design and Measurement of Gymnasiums, edited by the China Academy of Building Research, is a national industry standard approved by the Ministry of Construction, and has been implemented since March 1, 2001. Its main contents include: general principles; architectural acoustic design; noise control; sound reinforcement design and acoustic measurement (see JGJ/T131-2000, J42-2000 for details).

　　The competition hall is basically divided into the competition hall of the comprehensive gymnasium, the competition hall of the swimming pool and the ice skating hall.

　　2. The acoustic properties of the stadium

　　At present, there is no written norm to follow for the acoustic characteristics of stadiums. Recent data from the World Football Federation (FIFA) and the German Football Association (DFB) show that the steady-state sound pressure level of the stadium auditorium sound reinforcement is about 105dB.

　　2008 Beijing Olympic Games requirements for the acoustic characteristics of the main sound reinforcement system of newly built or renovated stadiums;

　　Sound pressure level: 95dB in normal use; maximum sound pressure level (emergency broadcast) 106dB.

　　Transmission frequency characteristics: language use 100Hz ~ 5KHz ± 5dB;

　　Music uses 100Hz ~ 15KHz ± 5dB.

　　Speech intelligibility: Rapid speech transfer index RASTI≥0.5.

　　It should be pointed out that although the stadium is a non-enclosed space, it is very important not to simply treat it as a free sound field in the sound reinforcement design. In most stadiums, there are "canopies" above the auditorium for acoustic reflection. A typical stadium that can accommodate tens of thousands of seats will have a reverberation time of about 5 seconds in an empty field, and the reverberation time when the stadium is full of spectators will also be There are about 3 seconds. Therefore, full attention should be paid to the design of the sound reinforcement system.

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