Lumped Receiver Connected to Test Setup with a 0.4-cc Coupler

Application ID: 19833

In this model a Knowles ED23146 receiver (miniature loudspeaker) is connected to a test set-up consisting of a 50 mm (1 mm diameter) earmold tube and a so-called 0.4-cc coupler. The receiver is modeled using a lumped spice network and connected to the finite element domain at the tube inlet. The response at the measurement microphone in the coupler as well as the electric input impedance to the receiver are compared to measurements. The losses in the long narrow tube are included using the Narrow Region Acoustics feature in the Pressure Acoustics, Frequency Domain physics interface.

This model requires the Acoustics Module and the AC/DC Module.

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