Acoustics & Vibrations Blog Posts
The Loudspeaker Celebrates 100 Years of Use and Influence
Did you know that December 10, 2015 marked 100 years since the first public display of a loudspeaker? Explore the device’s rich history and simulation’s role in advancing its design…
New Impedance Boundary Conditions for Acoustics Simulations
Get a comprehensive overview of the Impedance boundary conditions and how to use them for your acoustics simulations in COMSOL Multiphysics®.
Analyzing Forced Duffing Oscillations in Metal-Halide Lamps
2 independent researchers share insight into how they are optimizing the performance of metal-halide lamps using multiphysics simulation. Read the full story here >>
Simulating Acoustic Transfer Paths for Active Noise Control
A guest blogger from the FH Bielefeld University of Applied Sciences discusses simulating acoustic transfer paths with COMSOL Multiphysics® to mitigate noise in machinery designs.
Modeling Acoustic Orbital Angular Momentum
Get an introduction to acoustic orbital angular momentum and a demonstration of how to model it. Parr 2 of a blog series on modeling acoustophoretic forces.
A Thermoviscous Analysis of Acoustic Radiation Forces
Learn how to determine acoustic radiation forces, including thermoviscous and acoustophoretic effects, in the COMSOL® software.
Sweet Dreams with Diffusion Acoustics
Did you know that the acoustic diffusion equation is the quickest and easiest way to model high-frequency acoustics? Get an introduction to the concept of acoustic diffusion here.
Direct FSI Approach to Computing the Acoustic Radiation Force
In a follow-up to a previous blog post, we demonstrate a direct fluid–structure interaction approach for computing the acoustic radiation force in COMSOL Multiphysics®.
Phase Decomposition Analysis of Loudspeaker Vibrations
A guest blogger from Dynaudio A/S discusses using COMSOL Multiphysics® to perform a phase decomposition analysis of the vibrations in a loudspeaker.
Can We Hear the Shape of a Drum?
Over half a century ago, Mark Kac gave an interesting lecture on a question that he had heard from Professor Bochner ten years earlier: “Can one hear the shape of a drum?”
Modeling Room Acoustics with COMSOL Multiphysics
The field of room acoustics aims to study the sound quality of a space in a qualitative way. The Acoustics Module includes features to simulate the acoustics of rooms and other confined spaces.
How to Compute the Acoustic Radiation Force
Did you know that objects can actually be moved by sound? This effect is called acoustic radiation, and it is an acoustophoretic phenomenon that can be analyzed in the COMSOL® software.
New Piezoelectric Modeling Interface in COMSOL 5.0
As of version 5.0 of COMSOL Multiphysics®, there is a new interface for simulating piezoelectric devices; it has predefined features that make it easy to set up and run a piezoelectric model.
New Accumulators Boost Particle and Ray Tracing Functionality
Accumulators, a series of features available in the Particle Tracing Module, can be used to couple the results of a particle tracing simulation to other physics interfaces.
Analyzing Aircraft Engine Noise Through Simulation
By modeling flow duct systems in aircraft engines, it is possible to optimize the shape of certain engine duct parts and the lining properties in order to reduce the sound emission.
Acoustic Levitation Puts a Pure Spin on Medicine Fabrication
Engineers from Argonne National Laboratory used multiphysics simulation and trial-and-error prototyping to optimize the effectiveness of an acoustic levitator for medical fabrication.
Studying Sonar Systems on a Component Level
Did you know that “sonar” stands for sound navigation and ranging? Using simulation, you can study the individual components of a sonar system, including its electroacoustic transducer.
Seas of Change for Wind Turbines
One benefit of placing wind turbines offshore? They can’t be heard! Even better? High winds occur with more regularity offshore, making energy production more effective!
Natural Frequencies of Immersed Beams
A guest blogger from Veryst Engineering demonstrates the modeling of a cantilever beam immersed in a fluid to study its natural frequencies. Read it here >>
How to Model Thermoviscous Acoustics in COMSOL Multiphysics
Want to solve your acoustics model for acoustic pressure, velocity, or temperature variation? Enter the Thermoviscous Acoustics interface, which offers a simple and accurate way.
Theory of Thermoviscous Acoustics: Thermal and Viscous Losses
Here’s your comprehensive introduction to thermoviscous acoustics. Topics covered include theory, physics, boundary layers, bulk losses, attenuation, and narrow region acoustics.
MEMS Microphone Model Presented at ASA 166 in San Francisco
What is a MEMS microphone? Learn about this versatile device, as well as how to model it using COMSOL Multiphysics® with the add-on MEMS Module and Acoustics Module.
Thermoacoustics Simulation for More Robust Microphone Analysis
When performing an analysis on small-scale audio equipment, such as hearing aids, cell phones, and microphones, the obvious physical phenomenon that’s analyzed is pressure acoustics. However, there are other physics interactions that significantly affect these small devices, including electromechanical interactions and viscothermal losses. Most notably, thermoacoustics (the detailed modeling of acoustics including thermal conduction and viscous losses) is an often overlooked effect that can alter the results of a model. These effects are important in all devices with small length […]
Starting Small with Sonar Dome Design
Starting the design process by testing on a small scale is often the best way to tackle issues affecting large objects, like a ship. Detailed in COMSOL News 2013, researchers at INSEAN, The Italian Ship Model Basin, used small-scale testing and then simulation to analyze the effect of placing a sonar system within the bulbous bow at the hull of a ship. Using a small-scale model of a bulbous bow, the researchers at INSEAN performed fluid-structure interaction experiments, and subsequently […]
