1. Overview of the acoustic environment
In the decoration design of buildings such as museums, a large number of materials such as stone and glass are generally used, and the sound absorption coefficient of these materials is very small.
In the decoration design of buildings such as museums, a large number of materials such as stone and glass are generally used, and the sound absorption coefficient of these materials is very small.
In addition, due to the large number of people in the free open museum, the public space is filled with the sound of tour guides, tourists talking, air conditioners and other equipment, and the noise is mixed, which seriously affects the quality of visits.
Viennese acoustics.
2. Acoustic design basis
Hall Reverberation Time Measurement Specification GBJ76-84
Acoustic Environment Quality Standard GB3096-2008
3. Acoustic design indicators
The background noise should be less than40db(a)
The reverberation time of 500Hz in the middle frequency can be referred to the figure below.
Practical Architectural Acoustics
125hzThe ratio of reverberation time is250hzThe reverberation time ratio is2000hReverberation time ratio4000hzThe reverberation time ratio is
There are no acoustic defects such as acoustic focusing, flutter echo, and sound coloration.
Fourth, the content of acoustic design
Body design
The building composition of the museum is usually a large public space as the main body, and multiple exhibition spaces surround the large public space.
In modern museums, in order to make the perfect integration of public space and exhibition space and display of artistic effects, the public space of the museum is usually built into an atrium space.
There are many types of display space, such as: tandem, radial, aisle, hall and hybrid.
Viennese acoustics.
Control of reverberation time
Due to the special size of the museum and the way it is used, the museum is outdated, and in order to facilitate the visit, the doors of each exhibition space are open, so that a number of small spaces and public spaces will form a coupling space. Coupling space refers to the exchange of sound energy between multiple spatial openings directly connected to each other.
Coupling space results in longer reverberation times and lower speech intelligibility. In order to reduce the effect of acoustic coupling, we need to ensure that the reverberation time is the same in each display space as well as in the public space.
Viennese acoustics.
Selection and arrangement of sound-absorbing materials
The reverberation time in the display space is well controlled and we can use it on the ceilingaggSeamless sand absorption system can have a large amount of sound absorption
The AGG sand absorption system can have a high shaping function, which can not only cater to the decorative art effect of the museum, but also achieve the effect of supplementing the sound absorption.
The reverberation time of public spaces is difficult to control, because the floors of public spaces in museums are usually made of marble and stone, which has little sound absorption performance for the purpose of its decorative effect.
In order to prevent unnecessary acoustic defects and control the reverberation time, we use a thin plate resonance structure in the lower part of the surrounding wall, and also leave a 50mm cavity filled with 25mm glass wool.
If the public space belongs to the atrium space, the ceiling of the atrium space is mostly a lighting glass roof, and the sound absorption effect is poor, but the general ceiling is the main force of sound absorption, but without destroying the effect of the atrium space, we can use the space sound absorber, and the space sound absorber can also be made into a shape that conforms to the decorative effect of the museum, which is more suitable for the museum space.
If it is not an atrium space, you can use the way of flat lamination of glass fiber board to achieve its sound absorption effect.
Viennese acoustics.
5. Acoustic recommendations
The air conditioner can use the muffler air outlet for noise and vibration reduction, and for some other equipment, a vibration damping base can be added to achieve the purpose of noise reduction.
In addition, carpets can also be laid in the hall and places with a large amount of ** to achieve the purpose of noise reduction.