The Interior Lumped Speaker Boundary is used to model a miniature loudspeaker (dust cap, cone, surround assembly, and motor) or another microtransducer using a lumped representation with a coupling to an
Electrical Circuit interface. The mechanical and electric properties of the speaker can, for example, be prescribed through a Thiele-Small representation and associated lumped parameters. The interior version of the
Lumped Speaker Boundary includes the effects of the fluid domains on both sides of the speaker boundary explicitly. For time domain modeling including possible nonlinear lumped effects see the
Lumped Speaker Boundary and
Interior Lumped Speaker Boundary of
The Thermoviscous Acoustics, Transient Interface.
Define how the Speaker area (projected) of the speaker is computed by selecting either
Selected boundaries (the default) if all boundaries are present, or
Use symmetries if the speaker surface is only partially represented.
When Use symmetries is selected, select the
Speaker area multiplication factor Ascale as
Automatic (the default, the model is analyzed for the presence of symmetry conditions); or
User defined and enter a value (default is 1). The settings are required in order to compute the effective area of the speaker which is used to compute the acoustic load and radiated power.
Define the Speaker axis direction eax by selecting
Automatic (the default) or
User defined. 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 and is the only option when
Use symmetries is selected.
For the Automatic option select
Reverse automatic speaker axis direction if necessary. The axis orientation can be visualized by plotting the axis components
ta.ilsb1.e_axx,
ta.ilsb1.e_axy, and
ta.ilsb1.e_axz. (using the proper item and physics scope).