【摘要】 研究中对低压渗流制备方法进行了改进，并对制备的样品用驻波管法进行了吸声系数的测定。结果表明，样品随孔径的减小、空隙率的增大，综合吸声系数有增大的趋势。更多还原

【Abstract】 The sample of foam aluminium alloy was prepared by means of uper-pressure seeping method rather than low-pressure seeping method. Sound absorbent properties of the samples has been measured with standing wave method, the measurement result showed that the complex sound absorbent performace of alloy matreial got improved as pore size inside decreased and voidage increased.更多还原