Working Principle of Perforated Acoustic Panels
Date:2019-04-08 Views:1536
Perforated acoustic panels are made by drilling holes in sound-absorptive materials, with a layer of acoustic fabric attached to the back side. This structure forms numerous closed, honeycomb-shaped cells. These honeycomb cells impede air flow, thereby blocking the propagation of sound waves.
As we all know, sound travels through the air. When sound encounters an obstacle, part of it is reflected, and part passes through the object via vibration. Once sound enters the closed cells formed by the perforations, it resonates and oscillates repeatedly inside the cells, and its acoustic energy is rapidly dissipated. As a result, sound is quickly absorbed when it strikes a perforated acoustic panel.
The design of perforated acoustic panels is based on acoustic principles, with a variety of perforation patterns available. Some panels feature direct through-holes, while others adopt a honeycomb sandwich structure composed of a front panel and a back panel, each offering distinct advantages in sound absorption performance. Non-woven fabric is typically used as the acoustic backing material.
