What Are the Application Areas?
The Acoustics Module can be used in all areas of engineering and physics to model the propagation of sound waves in fluids and elastic waves in solids. The module also includes several multiphysics interfaces because it is common for many application areas involving sound to also have interaction between fluid and solid structures, have electric fields in piezoelectric materials, have heat generation, or require modeling of electroacoustic transducers.
Typical application areas for the Acoustics Module include:
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Automotive applications such as mufflers, particulate filters, and car interiors.
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Sound scattering, absorption, and sound emission problems.
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Civil engineering applications such as characterization of sound insulation and sound scatterers. Vibration control and sound transmission problems. Pipe acoustics for HVAC type of systems.
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Modeling of loudspeakers, microphones, and other transducers. Transducers are devices for transformation of one form of energy to another (electrical, mechanical, or acoustical). This type of problem is common in acoustics and is a true multiphysics problem involving electric, structural, and acoustic interfaces.
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Mobile applications such as feedback analysis, optimized transducer placement, and directivity assessment.
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Convected acoustics for jet engine noise, muffler systems with nonisothermal flow, and flowmeters.
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Ultrasound piezoelectric transducers.
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Musical instruments.
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Bioacoustic applications with ultrasound and more.
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Underwater acoustics and sonar applications.
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Pressure and elastic waves in geophysics.
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Room acoustics using the ray tracing method or an acoustic diffusion equation approach.
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Advanced multiphysics applications such as photoacoustics, optoacoustics, thermoacoustic cooling, acoustofluidics, acoustic streaming and radiation, and combustion instabilities.
Using the full multiphysics couplings within the COMSOL Multiphysics environment, you can couple the acoustic waves to, for example, an electromagnetic analysis or a structural analysis for acoustic-structure interaction. The module smoothly integrates with all of the COMSOL Multiphysics functionality.
Figure 1-2: Modeling a transducer is a true multiphysics application, comprising thermoviscous acoustics, electrostatics, and a membrane. Here the displacement of the microphone diaphragm from the Brüel & Kjær 4134 Condenser Microphone model from the Acoustics Module Application Library.