Acoustic Transformer

R2026b

Ideal transformer in acoustic systems

Since R2026b

• 

Acoustic Transformer 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 / Transformers

Description

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

The Acoustic Transformer block models an ideal power-conserving acoustic transformer using the equations

$$\begin{array}{l}{P}_2=T\cdot P_1\\ U_2=\frac{1}{T}\cdot U_1\end{array}$$

where:

• P₁ is the primary pressure (Pa).

• P₂ is the secondary pressure (Pa).

• U₁ is the volume velocity (m³/s) flowing into the 1+ terminal.

• U₂ is the volume velocity (m³/s) flowing out of the 2+ terminal.

• T is the pressure ratio of the acoustic transformer, analogous to the winding ratio of an Ideal Transformer (Simscape) in the electrical domain.

The two acoustic networks connected to the primary and secondary terminals of the acoustic transformer must each have their own Acoustic Reference block.

Ports

Conserving

1+ — Primary network positive terminal

acoustic

Acoustic conserving port associated with the positive terminal of the primary acoustic network.

1- — Primary network negative terminal

acoustic

Acoustic conserving port associated with the negative terminal of the primary acoustic network.

2+ — Secondary network positive terminal

acoustic

Acoustic conserving port associated with the positive terminal of the secondary acoustic network.

2- — Secondary network negative terminal

acoustic

Acoustic conserving port associated with the negative terminal of the secondary acoustic network.

Parameters

Pressure ratio — Pressure ratio of acoustic transformer

1 (default) | positive scalar

Pressure ratio (T) of the acoustic transformer, analogous to the winding ratio in the electrical Ideal Transformer (Simscape).

Version History

Introduced in R2026b