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, the Thermoviscous Boundary Layer Impedance feature is used.
With the increase in tools that can scan the ear canal, the simulation approach presented here also allows for “custom simulations” for 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:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.