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What Kind of Acoustic Material is the Best for Conference Room?

Author:Leeyin Acoustics  Date:2017-09-27  From:  Hits:78

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Conference room acoustic requirements

The establishment of a good listening environment includes architectural acoustics and electro-acoustic two aspects. Professional sound engineering architectural acoustics refer to the architectural acoustics of the hall. The reason why the same level equipment play different level is generally the different condition of architectural acoustics. No matter how good the equipment is, once placed in the condition where the architectural acoustics condition is poor, it certainly will not achieve good results. And the architectural acoustics requirements will be different because of the different engineering requirements, which will also be affected by the quality of building decoration. The hall with good architectural acoustics conditions should be reasonable reverberating, good sound diffuse, no sound focus, no audible vibration noise, no sound shadow, no sound standing wave and so on. The requirements of the architectural acoustics can not be made unilaterally by the sound designer, it requires the strong cooperation of the building decoration technical staff. Choose a good sound-absorbing material, so that the sound quality can achieve the best results.


How sound absorbing materials reduce noise and optimize sound effects?

Sound absorption refers to the phenomenon that the sound waves are gradually attenuated during the medium propagation. The sound absorption coefficient of the material is the percentage of the energy that can be absorbed when the sound energy is incident on the surface of the material.


Noise reduction can obtain up to 10-15dB noise reduction. Noise reduction=10lg(A0/A1). The less the amount of sound absorption indoor when the sound absorbing material is not added, and the more amount of sound absorption indoor after added with acoustic materials, the better the noise reduction effect. Due to reverberation, the noise in the workshop, the plant and large open space, will be 10-15dB higher than the same sound source outdoor. The reverberation sound can be absorbed by laying the sound absorbing materials indoors, so as to reduce indoor noise.


Sound-absorbing materials has a very important role in reducing indoor noise and improving the indoor sound quality, so it more and more drawing people’s attention. There are many different types of sound-absorbing materials. Different materials, different appearance, different structure, the sound absorption coefficient is also different.


When used, the number of sound absorbing materials can be determined by calculation. When selecting the specific material, we should take into account the sound insulation and beautiful requirements. Generally dry wall sound absorption is laying sound-absorbing material on the light steel keel, so as to form sound absorption structure system between the keel cavity, such as Leeyin wood acoustic panels, polyester fiber acoustic panels, wood wool acoustic panels, etc., which are better choice for decorative and acoustic design.


Low-frequency sound absorption structure suitable for conference room 

1.Acoustic board resonant sound absorption structure: Perforation on various sheets and set a certain depth of closed cavity behind the plate, it constitutes a perforated plate resonant sound absorption structure. When the sheet is lined with porous sound absorbing material, you can widen the absorption band of the perforated slit plate. Usually when perforation rate of the perforation plate is more than 20%, the perforated plate will not play the role of resonance sound absorption, the perforated plate at this time can be considered as a cover panel that only protects the backing of the sound absorbing material.


2.Leeyin acoustic panels, room in room structure acoustic design, such a structure can control its resonant frequency design within the desired range, which will get a significant effect. Its surface form can be perforated plate, and can also be made into resonant sound absorption masonry.


3.Fabric wrapped panel sound absorption structure, that is to set cavity behind the larger thickness porous sound-absorbing material required to meet the control of low-frequency.


In the control of the conference room, except that the owner relies on the sound absorption of the audience itself and the seat, high frequency reverberation time should be calculated according to reverberation. For parallel side walls and concave arcs, configuring strong sound absorption material in the wall can eliminate the flutter echo harmony and other defects. The medium and high-frequency sound-absorbing material for wall control is usually available for glass wool, mineral wool board, peripheral flame retardant fabric or tapestry, and can also be configured with borehole sound absorption structure aluminum plate or fibre board drilling) or fabric wrapped flame retardant foam and other structures.


The rear wall of the conference room podium can also carry out sound absorption treatment, to avoid the reflection sound from the back, causing the acoustic feedback of the pager on the podium. At the movie time, phase difference between back wall reflections and loudspeaker system will cause adverse acoustic interference.


The top of the meeting room usually do not do sound absorption treatment but as a reflective surface when the indoor sound absorption is to control the reverberation time to reach the design value. The configuration and selection of the sound absorbing structure of the conference room depends on its volumetric standard ( decoration requirements): in a small meeting room of about 100 square meters (general round table), if there are carpet, curtains and sofa seats, there is usually no need for sound treatment, you can achieve the expected reverberation time value. In the conference room above 200m², the sound absorber or structure should normally be arranged.



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