Acoustic Resistance

R2026b

Linear resistor in acoustic systems

Since R2026b

• 

Acoustic Resistance 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 / Acoustic Elements

Description

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

The Acoustic Resistance block models a linear resistor using the equation

$$P=U\cdot R$$

where:

• P is pressure.

• U is the volume velocity.

• R is resistance.

The conserving acoustic ports + and - correspond to the positive and negative terminals of the block, respectively. The volume velocity is positive if it flows from positive to negative. The pressure across the block is equal to the difference between the pressure at the positive and the negative terminal, P(+) – P(-).

Examples

New

Model a Helmholtz Resonator in Simscape Acoustics

Use Simscape™ Acoustics to model a Helmholtz resonator in the acoustic domain.

• Since R2026b
• Open Live Script

Ports

Conserving

+ — Positive terminal

acoustic

Acoustic conserving port associated with the positive terminal.

- — Negative terminal

acoustic

Acoustic conserving port associated with the negative terminal.

Parameters

Acoustic resistance — Resistance of acoustic resistance component

1 (Pa*s)/m³ (default) | nonnegative scalar

Resistance value of the acoustic resistance component.

Version History

Introduced in R2026b