Network Synthesis and Hybrid Modeling of Miniature Electroacoustic Sensors

摘要

Networks of linear, lumped parameter components are. quick and efficient tools to simulate miniature microphones used in hearing aids. Synthesizing a network simulating first-order effects in a microphone is straightforward, but when subtle mechanisms such as thermal conduction at cavity walls are introduced, more advanced techniques are called for. In the first part of this paper, a potentially novel method of synthesizing a network from known solutions of the diffusion equation is introduced. In the second part, another technique is discussed in which specific physical mechanisms are not directly considered, but a model is sought which only captures the observed behavior of a microphone. Finally, the opposite end of the modeling detail spectrum is examined, and a hybrid modeling method combining detailed multiphysics finite element analysis of critical components with lumped parameter modeling of surrounding structures to leverage the best of both modeling techniques.