Lumped Speaker Boundary

The condition is used to model a loudspeaker (dust cap, cone, and surround assembly) using a lumped representation with a coupling to an interface. The mechanical and electric properties of the speaker are described through a Thiele-Small parameter representation and associated lumped parameters. The properties of a back volume are also modeled using an impedance expression.

If the speaker represents an interior boundary, with air domains on both sides, and the back volume is modeled explicitly; then use the Interior Lumped Speaker Boundary condition.

Define how the (projected) of the speaker is computed by selecting either (the default) if all boundaries are present, or if only the speaker surface is partially represented. Enter the Ascale (default is 1). The settings are required in order to compute the effective area of the speaker.

Define the eax by selecting (the default) or . For the automatic option the axis is computed as the average of the surface normals, this option is valid if a full speaker surface is selected. The user defined option should be used if the speaker surface is only partially represented.

The does not model the acoustics on the back side of the speaker cone explicitly. The properties can be entered either through a volume giving a simple compliance effect, or through a user defined acoustic impedance of the back volume.

Select the as (the default) or . Enter either a Vback (SI unit: m3) or an Zac (SI unit: kg/(m4·s)).

This section gives information about the state of coupling/connection to an Electrical Circuit interface. If the is not connected the text text will be displayed. Once connected a reference with a tag to the associated node, in the Electrical Circuit interface, is displayed.