Ear Canal Acoustics

Application ID: 86281

In this tutorial model, the acoustics of the human ear canal are investigated. The output includes the input impedance and the transfer impedance, as well as the level transformation from the entrance to the eardrum.

The geometry of the ear canal used is based on measurements from test subjects reported in literature. The eardrum is modeled using the built-in physiological model for the human eardrum, and the impedance of the ear canal boundaries is modeled using the Skin impedance model. To include the thermoviscous boundary layer losses, a so-called boundary layer impedance (BLI) model is defined and used.

With the increase in tools that can scan the ear canal, the simulation approach presented her, also allow to do “custom simulations” to individuals. Earbuds or hearing aids can, for example, be virtually customized and fitted.

This model example illustrates applications of this type that would nominally be built using the following products: