A4.2 - Network Synthesis and Hybrid Modeling of Miniature Electroacoustic Sensors
- Event
- AMA Conferences 2013
2013-05-14 - 2013-05-16
Nürnberg - Band
- Proceedings SENSOR 2013
- Chapter
- A4 - Audio Transducers
- Author(s)
- D. Warren, D. Schafer - Knowles Electronics, Illinois (USA)
- Pages
- 89 - 94
- DOI
- 10.5162/sensor2013/A4.2
- ISBN
- 978-3-9813484-3-9
- Price
- free
Abstract
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.