Cone

R2026b

Acoustic propagation in a cone

Since R2026b

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Cone block

To add a block to a model, double-click the canvas and start typing the block name. Then, select the block from the list.

Libraries:
Simscape Acoustics / Applications / Tubes and Horns

Description

Add-On Required: This feature requires the Simscape Acoustics add-on.

This block models the transmission line of a cone. The model implements an equivalent circuit of a small-end Acoustic Inertance block, a uniform transmission line as a Cylindrical Tube With N Segments block, the transition from small-end to large-end as an Acoustic Transformer block, and a large-end Acoustic Inertance block.

The values in the equivalent circuit are computed using a standard conical waveguide model [1].

Ports

Conserving

P1 — Positive terminal at the small end of the tube

acoustic

Acoustic conserving port associated with the positive terminal at the small end of the tube.

P2 — Positive terminal at the large end of the tube

acoustic

Acoustic conserving port associated with the positive terminal at the large end of the tube.

N1 — Negative terminal at the large end of the tube

acoustic

Acoustic conserving port associated with the negative terminal at the large end of the tube.

Parameters

Axial length — Length of the cone

1 m (default) | positive scalar

Length of the cone in meters. The axial length must be larger than the difference of Large-end radius and Small-end radius.

Small-end radius — Small-end radius of the cone

0.1 m (default) | positive scalar

Small-end radius of the cone in meters. Small-end radius must be smaller than Large-end radius.

Large-end radius — Large-end radius of the cone

0.2 m (default) | positive scalar

Large-end radius of the cone in meters. Large-end radius must be larger than Small-end radius.

Number of segments — Number of segments in the tube

20 (default) | positive integer

Number of segments in the tube, specified as a positive integer.

References

[1] Benade, A. H. “Equivalent Circuits for Conical Waveguides.” The Journal of the Acoustical Society of America 83, no. 5 (1988): 1764–69. https://doi.org/10.1121/1.396510.

Version History

Introduced in R2026b