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PERFORATED THIN FILM SOUND ABSORBING CELL HAVING A GUIDE PORTION

机译:渗透的薄膜声音吸收细胞具有指导作用

摘要

The present invention relates to a perforated thin film sound absorbing cell having a guide part which prevents secondary noise caused by a grazing flow or a hole on an upper plate when the grazing flow exists on the top of the upper plate. A resonance sound absorbing cell includes a lower plate; a side plate formed along the edge of the lower plate at a predetermined height; and the perforated upper plate seated on the top of the side plate. When a grazing flow exists on the top of the upper plate, a streamlined guide part extends downward from one side to the other side of the hole of the upper plate, wherein the grazing flow reaches the other side and subsequently the one side of the hole of the upper plate.
机译:多孔薄膜吸声单元技术领域本发明涉及一种具有引导部的带孔薄膜吸音单元,该引导部防止在上部板的顶部存在掠流时由掠流或上部板上的孔引起的二次噪声。一种共鸣吸声单元,包括下板;沿下板的边缘以预定高度形成的侧板;穿孔的上板位于侧板的顶部。当在上板的顶部上存在掠流时,流线形的引导部分从上板的孔的一侧向下延伸到另一侧,其中掠流到达孔的另一侧,然后到达该孔的一侧。上盘的

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