Ultra-microplate

　　The microperforated plate can be seen as the parallel connection of a large number of microtubules (microperforations). Each microperforation is a very thin short tube. When the hole spacing is much larger than the hole diameter, it can be assumed that the characteristics of each hole do not affect each other, and the acoustic resistance of the microperforated plate

　　The impedance is simply equal to the acoustic impedance of a single hole divided by the number of holes. When the sound wave propagates in the pipe, considering the influence of viscosity, the vibration velocity of particle on the pipe wall along the axial direction is zero, and the vibration velocity on the central axis is large, and there is a velocity gradient along the radial direction in the pipe. On the other hand, when the hole spacing is much smaller than the wavelength, the reflection of acoustic waves from the plates between the holes can also be ignored.

　　Application area

　　·Places with high requirements for sound absorption and beauty at the same time, such as cinemas, concert halls, gymnasiums, banking halls, hospitals, office buildings, libraries, art galleries, exhibition halls, lecture halls, etc;

　　·Places with more people flow, such as airport waiting hall, subway station hall, railway station hall, internal space of ships, etc.:

　　·Space with cleaning requirements, such as precision electronic space, pharmaceutical and biochemical products workshop, cigarette factory cigarette packaging workshop, food processing workshop, etc.

　　Product Introduction

　　The application of ultra-microporous products is based on the concept of microporous sound absorption put forward by Academician Ma Daxian of China. The microwave wave structure on the microporous surface changes the transmission path under the ingenious arrangement of the tibia and ribs, and absorbs a large amount of particle impact energy. The microporous products in the wave valley also cause particle extrusion friction due to the velocity difference of the air particle through the oblique microporous acoustic impedance effect, and its kinetic energy is lost due to penetration, The remaining energy particles after penetration also produce particle viscosity effect and diffuse interference in the cavity co-vibration due to 500000 "geometric surfaces" on the back side per square meter, so that the sound energy can be attenuated in the cavity co-vibration to obtain good sound absorption effect.

　　Product features

　　1. Sound-absorbing mute

　　Advanced technology, special process, double-layer composite honeycomb structure, double-layer perforated with different apertures to form a broadband sound absorption effect, with a noise reduction coefficient of up to 0.7, in line with the Code for Design of Building Sound Insulation GB50118-2010

　　2. Excellent fire protection

　　Pure metal products, Class A fire protection, system structure, no other porous materials burning, no harmful gas generation, in line with the Classification of Combustion Performance of Building Materials and Products GB8624-2012

　　3. Beautiful design

　　Spraying/hot-pressing film coating (film thickness=0.2m), can also create special texture effect, with various colors (add WeChat at the end of the article to obtain the product standard color card)

　　4. Clean and dust-free

　　Pure metal decorative materials, free of any mineral, glass fiber, non-woven fabric and other additional components, and free from dust, fiber and other pollutants during installation and use, and will not absorb moisture and mildew, affecting the indoor air quality

　　5. Durability without attenuation

　　No additional materials such as non-woven fabric (sound-absorbing paper), rock wool, glass fiber, etc. are needed, and the sound-absorbing effect will not be attenuated due to the moisture absorption of the materials, and the service life of the product can reach more than 20 years

　　6. Green and environmental protection

　　Through the national environmental protection certification, the installation process does not need to use any glue, green and environmental protection

　　Improve the impeccable quality of space, and enhance the beauty and sound of architecture and structure

　　The ultra-microporous sound-absorbing aluminum plate with a hole height of 0.08ml can create a high sound absorption rate of more than NRC0.7. However, in order to more easily solve the noise and residual noise generated by various noise environments, the ultra-microporous sound-absorbing aluminum plate with a hole height of only 0.037m has been developed.

　　Non-absorbing cotton sound-absorbing test: the NRC is up to 0.85 after being tested by the construction project quality inspection station of Shanghai Tongji University.

　　In addition, low frequency noise is difficult to solve among the three frequencies of low frequency, medium frequency and high frequency noise. However, ultra-microporous sound-absorbing aluminum plate has a very high sound absorption rate in the 60-500H range. Therefore, in the environment with medium and low frequency noise hazards, ultra-microporous sound-absorbing aluminum plate and appropriate air layer can be used to achieve the maximum efficiency of absorbing and reducing noise.