New environment-conscious material with low-frequency-sound absorption and comfortable sound characteristics using fiber-reinforced organic hybrid

采用纤维增强有机混合材料，具有低频吸音和舒适声音特性的新型环保材料

基本信息

批准号：
16206066
负责人：
SUMITA Masao
金额：
$ 31.28万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
2004
资助国家：
日本
起止时间：
2004 至 2007
项目状态：
已结题

项目摘要

We investigated the relationship between comfortable sound properties and damping characteristics of organic hybrid.In order to obtain organic hybrid with higher damping performance, we studied on factors determining damping performance of organic hybrid and influence on an addition of inorganic fillers such as carbon and silica particles and carbon fiber.It was found damping performance is influenced by amount, intensity and structure of interaction between polymer and low molecule, besides an energy loss by polymer and low molecule themselves.Addition of inorganic filler improved damping performance, resulting from high energy loss at the interface between filler and matrix. The increase in damping performance by addition of inorganic filler decreased with increasing content of low molecule. This is because an applied mechanical energy becomes difficult to transmit to the filler surface by fluidity of low molecule at higher content of low molecule. However, further addition of inorganic filler recovered transmission of mechanical energy to a filler surface, resulting in an increase in damping performance.For investigation of comfortable sound properties, we estimated a transfer function between input signal and output sound of a speaker lined with and without organic hybrid. By lining with organic hybrid, we observed a change in a transfer function at certain frequency. We supposed this change in a transfer function influenced on comfortable sound properties.

研究了有机混合材料的舒适声音性能与阻尼特性之间的关系。为了获得具有更高阻尼性能的有机混合材料，我们研究了决定有机混合材料阻尼性能的因素以及碳、二氧化硅颗粒等无机填料添加量的影响。研究发现，除了聚合物和低分子本身的能量损失外，阻尼性能还受到聚合物和低分子之间相互作用的数量、强度和结构的影响。添加无机填料改善了阻尼性能，这是因为在填料和基体之间的界面。添加无机填料对阻尼性能的提高随着低分子含量的增加而降低。这是因为在低分子含量较高时，所施加的机械能变得难以通过低分子的流动性传递至填料表面。然而，进一步添加无机填料恢复了机械能向填料表面的传递，从而提高了阻尼性能。为了研究舒适的声音特性，我们估计了有衬里和无衬里的扬声器的输入信号和输出声音之间的传递函数有机杂种。通过衬里有机杂化物，我们观察到传递函数在一定频率下的变化。我们认为传递函数的这种变化会影响舒适的声音特性。