International audienceA dedicated toolbox has been developed within ASYGN a recent software tool that simulates aVLSI circuits at a high-level of modeling. It accounts in both time- and frequency- domain for the specific feature of bio- and electro- acoustic systems especially when some of the constituting elements are very thin or narrow. The models correspond to systems of complex equations in which some of the complex coefficients can be frequency dependent. Results are solved and viewed in real time. The tool was developed to introduce some improvement in the model of the auditory system of the cricket. In 2007 Reeve et al. designed and tested an electrical equivalent circuit based on Michelsen 1994. The latter results from two major simplification namely the absence of thermoviscous effects and of any acoustical role of a septum located in the middle of a transverse acoustic trachea. Thanks to the weak couplings the model can be subdivided into independent elements such as tubes, cavities or membranes simply connected together. Thermoviscous effects and the role of the medial septum can now be fully investigated. Our results were first validated using Matlab. Our model reveals interesting feature compared to its historical counterpart