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Acoustics & Vibrations Blog Posts

Analyzing Hearing Aid Receivers with Lumped-Parameter Modeling

March 17, 2017

Modeling complete hearing aid systems is extremely computationally expensive. Enter lumped-parameter modeling, which enables you to couple a system component to a test setup for validation.

Using the Discontinuous Galerkin Method to Model Linear Ultrasound

January 26, 2017

You can easily model acoustically large problems, like linear ultrasound, with a predefined physics interface that uses a memory-efficient approach called the discontinuous Galerkin method.

Keynote Video: Solving 2 Transport Process Problems with Simulation

January 19, 2017

In a keynote presentation from the COMSOL Conference 2016 Boston, Carl Meinhart from the University of California, Santa Barbara and Numerical Design discusses simulating transport processes.

Keynote Video: Locating Leaks in Pipe Networks with a Simulation App

January 16, 2017

Sebastien Perrier of Echologics discusses a simulation application used to locate leaks in underground pipe networks in his keynote presentation at the COMSOL Conference 2016 Boston.

How to Model an Anechoic Coating

January 5, 2017

Modeling an anechoic coating involves finding the smallest unit cell, truncating the geometry, and analyzing the wave diffration. The COMSOL® software includes predefined interfaces to do so.

How to Use Acoustic Topology Optimization in Your Simulation Studies

November 3, 2016

Today, guest blogger René Christensen of GN Hearing discusses the importance of acoustic topology optimization and how to apply it in COMSOL Multiphysics. Topology optimization is a powerful tool that enables engineers to find optimal solutions to problems related to their applications. Here, we’ll take a closer look at topology optimization as it relates to acoustics and how we optimally distribute acoustic media to obtain a desired response. Several examples will further illustrate the potential of this optimization technique.

Optimizing a Tunable Organ Pipe for Ocean Acoustic Tomography

November 1, 2016

Ocean acoustic tomography systems measure temperature using an acoustic signal that travels between two instruments. These systems often need to cover a broad frequency band with low-frequency signals and require a high-power sound source. One option to achieve these goals is a tunable organ pipe, which balances efficiency and functionality. A researcher at the Advanced Technology Group, Teledyne Marine Systems used simulation to improve his tunable organ pipe design and compared the results to experimental tests.

Efficiently Calculating the Acoustic Transfer Impedance of a Perforate

September 29, 2016

Perforations, in mufflers for example, enable partial sound transmission between chambers as well as in and out of pipes. When simulating perforates, it’s possible to draw and mesh each hole, but this increases the time it takes to solve the model. For a more efficient approach, we can apply a semitransparent boundary. Here, we’ll discuss several techniques for doing so as well as describe a method for computing the transfer impedance of the perforate.


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