Articles techniques et présentations

In a continuation of our previous work on the modelling of the dynamic microstructural viscous and thermal dissipation mechanisms in cylindrical fibrous porous materials, we have now extended the approach to include isotropic 3D Kelvin foam cell geometries having cylindrical strut ... En savoir plus

Models generated from 3D image data (such as MRI or CT) are used in COMSOL Multiphysics® to analyse real-world problems and gain insights into biomechanical and industrial processes. We work with customers from different areas, from Life Sciences to Materials Science, to implement ... En savoir plus

In our work, simulations of a piezoelectrical micromachined ultrasonic transducer compatible with CMOS-MEMS process are presented. The piezoelectric material of the PMUT is AlN sandwiched between two Al layers and a top Si3N4 passive layer. The piezoelectric and the metal materials have ... En savoir plus

Ultrasound technology is deployed in a variety of scientific and engineering applications, ranging from the non-invasive retrieval of system information to the stirring of molten metals. While ultrasonic sound waves found a wide range of applications in liquid media, the use of those in ... En savoir plus

Finite Element simulations are becoming an increasingly powerful tool in the transducer design process. The development of user-friendly software and predefined interfaces able to provide physics setup to predict the loudspeaker complex behavior helps designers in the product development ... En savoir plus

There is an increasing number of applications that requires using the time-dependent analysis of finite amplitude acoustic wave propagation or nonlinear acoustics. This study investigates an efficient finite element based numerical model of microperforated plate absorber using the time ... En savoir plus

As a general definition, the presence of any repeated motion after a regular interval of time is known as vibrations. The basic theory of vibrations is described by the system of forces acting on a moveable and deformable body. The natural phenomena existing in the universe such as ... En savoir plus

Multiphysical simulation is a daily-used tool for loudspeaker design and engineering, however it is still a time expensive process that requires specific modeling capabilities. In order to increase engineering efficiency and to broaden the usage of multiphysical simulation, at ... En savoir plus

Introduction In recent years there has been a focus on using topology optimization in the field of acoustics [1,2], whereas previously the technique has been applied mostly within structural mechanics, thermodynamics, and fluid dynamics [3]. This paper describes the mathematical basis ... En savoir plus

MEMS microphones consist of a conductive backplate and a conductive flexible membrane. The backplate and the membrane are at a certain distance from each other to be interpreted as parallel plates of a capacitor. When a bias voltage is applied to the electrodes, membrane deflection ... En savoir plus