Theoretical analysis and experiment study on the acoustic parameters of metal rubber materials

【摘要】 <正>The acoustic parameters of metal rubber materials were theoretically and exper- imentally investigated.Under the assumption that metal rubber materials were homogenous, isotropic and porous structures,formulas were deduced for the calculations of effective sound velocity,characteristic impedance,propagation constant,structural constant and flow resistiv- ity.The structural constant of metal rubber materials with different structural parameters were obtained and analyzed by using experiments.The experimental and theoretical values of characteristic impedance and propagation constant were compared and analyzed.It is shown that the proposed theoretic method based on the homogenous,isotropic and porous material model is suitable to calculate the acoustic parameters of metal rubber materials.更多还原

【Abstract】 The acoustic parameters of metal rubber materials were theoretically and exper- imentally investigated.Under the assumption that metal rubber materials were homogenous, isotropic and porous structures,formulas were deduced for the calculations of effective sound velocity,characteristic impedance,propagation constant,structural constant and flow resistiv- ity.The structural constant of metal rubber materials with different structural parameters were obtained and analyzed by using experiments.The experimental and theoretical values of characteristic impedance and propagation constant were compared and analyzed.It is shown that the proposed theoretic method based on the homogenous,isotropic and porous material model is suitable to calculate the acoustic parameters of metal rubber materials.更多还原