Articles techniques et présentations

This study focuses on the acoustic design of a multipurpose hall with a volume of approximately 3,000 m³, which is subject to strict architectural constraints. These constraints limit interventions to the suspended ceiling only. The primary objective is to reduce the reverberation time ... En savoir plus

Synthetic jet actuators enhance flow control by generating pulsatile jets with zero net mass flux. There is a need to develop a computationally inexpensive model that can generate optimal geometric actuator designs of maximum jet performance. This work investigates the multi-physics ... En savoir plus

MEMS microphones have been widely adopted in a variety of consumer electronic systems. To ensure clear speech transmission and avoid degradation of important signals, careful tuning of microphone port geometry is essential to mitigate wind-induced airborne noise. This additional noise ... En savoir plus

Ultrasonic nondestructive testing (NDT) is extensively used in fields like medicine, oil and gas, and aerospace to inspect materials without causing damage. However, developing experimental setups and prototypes can be costly and time-consuming. This study employs advanced computational ... En savoir plus

Problem - The occlusion effect is an increase in loudness (sound pressure level) of your internal voice, especially in the low frequency range. Also, self-generated sounds such as chewing, swallowing, walking or running are amplified when the ears are blocked or occluded. Occlusion ... En savoir plus

Electret condenser microphones are one of the most used transducers for a variety of applications. The engineer designing these cartridges must take into consideration many factors to create a design that meets its specifications. Most parts of the design have multiple constraints across ... En savoir plus

We have recently published the discovery of avoided crossings present in the spectrum of freely vibrating rectangular thin plates(1). In this poster we show how the Structural Mechanics module of COMSOL Multiphysics was a fundamental tool to accomplish this feat, by easily generating ... En savoir plus

Electrothermal actuators convert an electrical signal into a mechanical signal via Joule heating. Due to their simplicity and reliability, electrothermal actuators are commonly used in various fields across length scales: from human-scale soft robotics to nanometer-scale sensors. We ... En savoir plus

Introduction: The endothelial cells (ECs) in the blood brain barrier (BBB) are disrupted with age, genetic predisposition, or stroke and can lead to vascular cognitive impairment and dementia (VCID). Current treatments involve opening the BBB with high-frequency-ultrasound to deliver ... En savoir plus

Excessive vent noise poses a prevalent challenge in various acoustic applications, significantly impacting the performance and user satisfaction of audio systems. This research investigates the efficacy of noise reduction using a lumped speaker model implemented in COMSOL Multiphysics. ... En savoir plus