Abstract
In this report the tapered acoustic matching section was mainly analysed. On making appropriate assumptions, matching section may be considered as an inhomogeneous transmission line and its reflection factor can be calculated by solving the nonlinear differential equation of the inhomogeneous transmission line with a numerical solution, and the effect of a spacial part of the acoustic matching section can be analysed by utilizing the same, but by a simplified differential equation. By considering the frequency characteristic of acoustic matching sections, the author found the designing method of a broad-band acoustic matching section, by making the reflection factor sufficiently small with a choice of suitable length of a spacial part and an attenuation part at the lowest frequency.
