Far-Field Pressure Sensor

R2026b

Radiated far-field pressure sensor in acoustic systems

Since R2026b

• 

Far-Field Pressure Sensor 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 Sensors

Description

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

The Far-Field Pressure Sensor block calculates the radiated on-axis far-field pressure from the volume velocity, assuming radiation from an infinite baffle and that the source is small compared to the wavelength.

The on-axis far-field pressure from the (infinitely) baffled circular piston when the source is small compared to the wavelength is

$$P_{{}_{ff}}=\frac{dU}{dt}\cdot \frac{\rho }{2\pi D}$$

where:

• P_ff is pressure.

• U is the volume velocity.

• ρ is air density.

• D is distance.

• t is time.

Examples

New

Loudspeaker Enclosure Modeling with Simscape Acoustics

Simulate different types of loudspeakers using Simscape™ Acoustics.

• Since R2026b
• Open Script

New

Measuring Loudspeaker Nonlinearities Using Swept Sine Excitation

Simulate and measure loudspeaker nonlinearities using impzest, sweeptone, and Simscape Acoustics.

• Since R2026b
• Open Script

Ports

Output

P_ff — far-field pressure, Pa

physical signal

Physical signal output port for the pressure measurement.

Conserving

+ — Positive terminal

acoustic

Acoustic conserving port associated with the positive terminal.

- — Negative terminal

acoustic

Acoustic conserving port associated with the negative terminal.

Parameters

Distance — Distance from acoustic source

1 m (default) | positive scalar

Distance from acoustic source in meters.

Version History

Introduced in R2026b