Technical Papers and Presentations

In this paper, the underlying concept of electroacoustic absorbers is studied with the help of Comsol Multiphysics® Acoustics Module. Among the different ways to obtain variable acoustic properties on an electroacoustic transducer's voicing face, there is the shunting of the transducer's electrical input. With such shunt devices, the acoustic impedance that the transducer's membrane presents to the acoustic field takes account of an acoustic equivalent of the electrical load that can take many values within a specified range. It has been chosen to develop a multiphysics model of a passive shunt strategy, using a resistor. This presentation aims at describing and assessing the performances of this concept as an acoustic damper of the modal behavior in an acoustic waveguide.