抄録
The estimation of acoustic characteristics based on the one-dimensional model of fourpole parameters matrix for the complex acoustic system is not always in good agreement with the experimental results. The fundamental resonance frequencies are shifted by the effect on the presence of higher order modes of wave propagation. Because of the influence of frequency shift, the estimated acoustic characteristics are different largely from ones of measurement when many elements are connected in series. In this paper, a method to derive the four-pole parameters matrix of the elliptical cylindrical cavity including the characteristics of the connection part of elements is presented. Furthermore, the method is developed in the case of circular cylindrical cavity. The experimental results are compared with the estimated characteristics obtained by the proposed method and those by one-dimensional model is made.
