Engineering Introduction:

With the development of sports and cultural undertakings, a large number of gymnasiums have been built or will be built in all parts of the country. Most of these gymnasiums are comprehensive multi-purpose gymnasiums, which can be used for large-scale theatrical performances besides sports competitions and training. These gymnasiums are actually multi-functional gymnasiums. In order to satisfy the multi-functional use requirements of the gymnasium, they must be professionally acoustically designed.

Relevant standards and specifications:

1.Code for building design of Gymnasium (JGJ31-2003; J265-2003)

2.Regulations for acoustics design and measurement of Gymnasium (JGJ/T131-2000; J42-2000)

3."Standard for measurement of reverberation time in halls" GBJ76-84

4.The sound insulation and sound absorption of buildings in the Ministry of construction (National Architectural Standard Design Atlas 08J931)

5."Code for building structure load" (GB50009-2001)

6.Code for fire protection design of buildings GBJ16-1987 (2001 Edition)

7.Code for fire protection of interior decoration design (GB50222-95)

8."Sound environmental quality standard" (GB3096-2008)

Sound quality design:

1、Standard requirements for building design code for gymnasium (JBJ31-2003; J265-2003).

Gymnasium hall 500 to 1000Hz reverberation time

Swimming hall competition hall full 500 to 1000Hz reverberation time

The ratio of reverberation time to reverberation time of 500-1000Hz

Background noise limit of gymnasium competition hall (room)

The reference value of the acoustical design index of the stadium

2, sound quality defect

1)the volume of the gymnasium is large, and the free voice path is too large. It is easy to produce echoes and multiple echoes, and make people listen to noise. The normal operation of the sound equipment.

2)the shape rules of gymnasium, such as rectangle, square and so on, are easy to produce vibrant echoes. The shape of gymnasium is irregular, such as round and arc, and it is easy to produce the phenomenon of sound focusing.

3)noise is generated in the gymnasium with all kinds of functional rooms. The increase of background noise affects the normal use of gymnasium.

Solution:

1, design reasonable reverberation time according to the functions and uses of venues, and install sound absorbing materials in the corresponding positions of the competition hall.

2, the competition hall should make use of rest corridors and so on to isolate noise from outside.

3, to the competition hall, the VIP lounge, the sound expansion control room, the television review room, the sound expansion studio and other rooms, and the return air tube to take sound, noise reduction and damping measures.

4, air conditioning room, boiler room and other equipment room should be far away from the competition hall, the VIP room and other room with quiet requirements, when it is adjacent to the main building, take effective noise reduction and vibration isolation measures.