With the application of sound absorbing panels China manufacturer in large-scale projects, people have a vague understanding of the principle of sound absorption, so they have some misunderstandings about acoustic fabric panels China manufacturer.

One of the misconceptions is that a material with a rough surface has sound absorbing properties, but it is not. For example, the brushed cement and the surface of the stone have no sound absorbing ability.

The second misunderstanding is that acoustic sound panel China manufacturer with a large number of holes inside the material, such as polyphenylene, polyethylene, closed-cell polyurethane, etc., have good sound absorption properties. In fact, these materials cannot penetrate due to the lack of connectivity of internal pores. The internal vibration of the material is frictional, so the sound absorption coefficient is small. A perforated plate with an air layer on the wall or ceiling, even if the material itself has poor sound absorption properties, this structure also has sound absorbing properties. This type of sound absorption is called Helmholtz resonance sound absorption, and the sound absorption principle is similar. The acoustic resonance of the thermos bottle, the external space of the material and the internal cavity are connected by a narrow bottleneck. When the sound wave is incident, at the resonance frequency, a sharp resonance between the air and the internal space of the neck causes the acoustic energy to be lost.