Standard sizes: 600*1200*50mm, 600*2400*50mm, 600*1800*50mm, 1200*1200*50mm, etc. Thickness can be made in (50mm, 75mm, 80mm, 100mm) or customized according to buyer's specifications. Waste calculation is separate.
An acoustic absorber is a dispersed suspension installed at the upper part of a building space, designed to reduce indoor noise or improve the room's acoustics. It features minimal material usage, light weight, cost-effectiveness, high absorption efficiency, flexible arrangement, and easy installation. The shape of acoustic absorbers can vary based on the building's usage, area, height, structural form, decorative requirements, and sound source characteristics, including plate-like, cuboid, cylindrical, conical, and spherical forms. Among them, the plate-like structure is the simplest and most widely used. Acoustic absorbers are commonly used in indoor sports arenas, where their diverse shapes and arrangements enhance the room's decorative effect. Most importantly, their sound absorption properties prevent echo defects in large halls and effectively reduce the reverberation time.
One. Principle of sound-absorbing bodies in space
Compared to acoustic materials on indoor surfaces, space absorbers have a higher acoustic absorption efficiency per projected area. This is due to the larger effective absorption area of space absorbers, including their upper surface, lower base, and sides. Additionally, as sound waves are reflected multiple times between the upper surface of the absorber and the building's ceiling, they are absorbed repeatedly, increasing the absorption amount and enhancing the efficiency. The improvement in absorption efficiency at medium to high frequencies is typically most pronounced. The acoustic performance of space absorbers is commonly represented by the effective absorption volume of individual absorbers at different frequencies. The noise reduction (or reduction in reverberation time) effect of space absorbers primarily depends on the number of absorbers, the spacing between them, the material, and the structure, as well as the acoustic conditions within the building space. If the original indoor surface has little absorption and reflects more sound, resulting in a long reverberation time, the addition of space absorbers can significantly improve these conditions.
Section 2: Materials and Structure of Sound Absorbing Elements
Common acoustic spaces are composed of a frame, a facing layer, and an absorbent material. The choice of material should be based on the size, stiffness, and decoration requirements of the acoustic space. The frame can be made of wood, angle iron, thin-walled steel, aluminum frames, etc. The protective facing layer can be fire-resistant fabric, sound-insulating felt, or glass fiber cloth. The absorbent material usually consists of ultra-fine glass wool wrapped in glass fiber cloth, with a filling density of 48KG or 64KG of sound-absorbing cotton. The thickness should be selected within a range of 5 to 10 centimeters based on the frequency spectrum characteristics of the sound source.
Three: Number of Suspended Sound Absorbers
The number of suspended acoustic bodies should be calculated and determined based on the acoustic properties of the bodies and the additional acoustic absorption required to reduce indoor noise (or control the reverberation time). When designing with plate-type acoustic bodies, if the total area of the acoustic bodies is equivalent to 30% to 40% of the building's roof area, the acoustic efficiency of the plate-type acoustic bodies can reach an optimal value. In actual projects, to meet the requirements of noise reduction or reverberation time control, the total area of the acoustic bodies should be about 50% to 60% of the building's roof area. Increasing the number of acoustic bodies may actually degrade the overall acoustic performance of the space, leading to economic waste.
Four: Suspension Methods for Acoustic Absorbers
Acoustic baffles are mostly suspended from the ceiling of building spaces, with most being hung from the top. Plate-type acoustic baffles can be horizontally or vertically suspended, or both, and their noise reduction effect is generally the same when the total area is the same. The height from the ceiling for horizontally suspended plate-type acoustic baffles is typically around 1/5 to 1/7 of the room's net height. Generally, considering the ease of installation, acoustic baffles are hung below the steel framework of the building ceiling, which is around 1/5 to 1/7 of the room's net height, meeting the requirements for sound absorption and decoration. If possible, they can be hung lower, closer to the sound source. To enhance the architectural decoration effect of suspended acoustic baffles, a comprehensive consideration of their form, color, and hanging method is necessary. If the acoustic baffles are hung to create artistic patterns and are coordinated with lighting, ventilation, and architectural decoration, the overall effect will be even better.
Section 5: Applications of Acoustic Absorbers
Broadly applicable in indoor gymnasiums, basketball courts, badminton halls, sports facilities, swimming pools, noisy factories, as well as radio and TV studios, recording rooms, studios, schools, large theaters, libraries, cultural centers, auditoriums, multifunctional halls, meeting rooms, and concert halls, where high-quality sound is a priority.
