JIANG Hongyuan¹ WU Guoqi¹  E.A. Izzheurov²

(1 School of mechatronics engineering, Harbin Institute of Technology  Harbin 150001)

(2 Samara State Aerospace University  Samara of Russia 443086)

Received Sept.26, 2007

Revised Oct.9, 2007

Abstract The acoustic parameters of metal rubber materials were theoretically and experimentally 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 resistivity. 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.

PACS numbers: 43.50, 43.20