Abstract
Balanced armature transducers, also known as receivers, are commonly used in hearing aids, hearables, and in-ear monitors. These are difficult to simulate. They are very small devices, designed to fit inside the ear canal, and measurement of basic quantities is physically difficult. Additionally, multiple magnetic non-linearities are balanced to create a high-efficiency / high-output device. Spice simulations are well suited to understand the linear frequency response of the device. Finite element simulations are well suited to study steady state magnetic and geometric non-linearities. Time domain algebraic differential equation techniques can bridge these two simulation regimes. With this tool the amplitude response, frequency response, and distortion caused by the non-linearity’s can be studied. The talk will examine strengths, weaknesses, and when it is appropriate to use each of these individual techniques.
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