Consultez les proceedings de la Conference COMSOL 2020
Modeling of Acoustically Induced Rapid Mixing Processes in Microchannels Using Acoustic Streaming
Technical advancements in miniaturization in the last decades have, among others, brought forth the technology of so called “Lab-on-a-Chip” (LOC) systems. These systems provide the possibility to automate and accelerate certain laboratory processes, e.g., biomedical diagnostics, on the ... En savoir plus
Advancements in Acoustic Topology Optimization
The design of products in the audio industry is to a large extent done via a combination of prior knowledge and trial-and-error. Such an approach will sometimes be seen described as an ‘optimization’ of said products, but we will here focus on the formal mathematical approach of ... En savoir plus
Simulation of a Hybrid (Active/Passive) Acoustic Measurement Room
The ideal way to measure the acoustic performance of heavy items such as vehicles or machines is in a semi-anechoic chamber, i.e. in an environment with no reflections except from the solid floor where the noise source is standing. To accurately measure low frequencies down to 20 Hz ... En savoir plus
Evaluation of the Ray-Tracing and Pressure Acoustic Solvers for Audio Simulations in a Vehicle
For automotive applications, acoustical simulation methods are used to optimize the position and orientation of the loudspeakers to get the best audio system performance. The goal of the presented paper is to evaluate the accuracy of the Pressure Acoustics interface (Finite Element, wave ... En savoir plus
Designing a Structural Fastener Assembly Resistant to Vibrational Stress Using COMSOL Multiphysics®
RAKON is a worldwide expert in high performance crystal oscillator. The company decided to expand its product range to larger space equipment, the Master Reference Oscillator (MRO). This product is composed of stacked mechanical modules, joined together by structural screwed assemblies. ... En savoir plus
Acoustic Propagation Model in 3D of Dolphin Echolocation Formation Inside Head Tissues
Introduction The echolocation signals of dolphins consist of forward-projected sound pulses that reflect off objects and are used to probe underwater surroundings. Despite rigorous studies of dolphin echolocation, there remain questions about how echolocation sounds are produced and ... En savoir plus
Acoustic-Mechanic Modeling of Polydimethylsiloxane in the MHz Regime for Metamaterials Applications
Polydimethylsiloxane (PDMS) is a biocompatible material widely used in biomedical applications such as implantable sensors. A realistic modeling of PDMS in acoustic-mechanic simulation is useful especially for medical applications which use ultrasonic waves as interrogation source. ... En savoir plus
Optimization of Loudspeakers
Loudspeakers, specifically electrodynamic transducers with enclosures, are used almost everywhere in our life. Transportation of acoustic information is vital for humans since the very beginning of the human evolution. Hence, reproduction of acoustics has a long tradition in engineering ... En savoir plus
Acoustic manipulation capabilities of a multifrequency AlN based PMUT
Contactless manipulation of microscopic objects through acoustic waves has proven an attractive solution for several applications over the past decades. This modality is particularly interesting for the manipulation of bio-particles (BPs) due to its relatively low intensities, capability ... En savoir plus
Electrode design for efficient excitation of vibrational modes in an AlN based PMUT
Piezoelectric micromachined ultrasound transducers (PMUTs) are gaining increasing interest as miniaturized, low-power devices which can be easily integrated with electronic systems for applications such as medical imaging, therapeutic ultrasound, and particle manipulation. This work ... En savoir plus