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复合型吸隔声模块

2014-08-29 总浏览:

 

 

 

复合型吸隔声模块的表面有很多小孔,声音进入小孔后,便会在结构的内壁中胡乱反射,直至大部份声波的能量都消耗了,变成热能,达到了隔音的效果。
吸声板特点

具有较强的吸收声能、减低噪声性能的材料。

吸声材料按吸声机理分为

①靠从表面至内部许多细小的敞开孔道使声波衰减的多孔材料,以吸收中高频声波为主,有纤维状聚集组织的各种有机或无机纤维及其制品以及多孔结构的开孔型泡沫塑料和膨胀珍珠岩制品。

②靠共振作用吸声的柔性材料膜状材料,或板状材料和穿孔板(各种板状材料或金属板上打孔而制得,吸收中频)。以上材料复合使用,可扩大吸声范围,提高吸声系数。控制噪声。多孔材料除吸收空气声外,还能减弱固体声和空室气声所引起的振动。将多孔材料填入各种板状材料组成的复合结构内,可提高隔声能力并减轻结构重量。
吸声板用途

运用于城市轻轨、高架道路、动力设备、机械设备、铁道、公路、桥梁、隧道、航空、航海、高架公路等场合的吸声结构。

 

 

    There are many small pores on the surface of composite sound insulation module. After entering into them, the sound is randomly reflected within the structural inner wall till the most of sound wave energy is consumed and turns into the thermal energy; thus the sound insulation is realized.
Characteristics of panel absorber
    The panel absorber is made of the material that is capable of absorbing sound energy and reducing noise.
    According to the sound absorption mechanism, the sound absorption material can be divided into the following types: 

    The cellular material that achieves sound wave attenuate by means of tiny open pores distributed from the surface to the inner can absorb the high and medium-frequency sound wave; such as the organic and inorganic fiber with the fibriform gathering tissue (including their products), pored foamed plastic or the expanded perlite product with the porous structure.

    The flexible or the membrane material that may absorb sound via resonance, or the plate material or the perforated plate (it is made by perforating all kinds of plate materials or metal plates, used for absorbing the medium-frequency sound). The combination use of the above materials can expand the sound absorption range, improve the sound absorption coefficient, and control noise. In addition to absorbing air sound, the perforated material can also weaken the vibration caused by the solid-borne noise and the air-chamber noise. The perforated materials filled into the composite structure composed of various plate materials can improve the sound insulation capability and reduce the structural weight.


Use of panel absorber

    The panel absorber can be widely used in the sound absorption structures of urban light rail, elevated road, power plant, mechanical equipment, railway, highway, bridge, tunnel, aviation, navigation and overhead highway.

 

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