【摘要】 基于机电类比原理,从特殊形式波动方程出发,推导出了指数形变截面声波导管的等效电路,从等效电路推导出了声波导管的阻抗转移公式.讨论了指数形波导管输入阻抗与负载阻抗之间的关系,并对其声传输特性进行了分析,为变截面声波导管的阻抗计算及工程设计提供一种简便而有效的等效电路分析方法.更多还原

【Abstract】 Based on the theory of the electromechanical analogy and the special wave equation,the equivalent circuit of the exponential acoustic waveguide was derived,the formula of its impedance transformation was obtained.Then the relations between input and load impedance of the exponential waveguide was studied,the corresponding curve was presented and the sound transmission characteristics of the waveguide was discussed as well.It was proposed a new method of equivalent circuit for the engineering designs and calculations of the non-uniform cross-section waveguide.更多还原