Potentialities and limits of magnetoelasticity applications for noise detection and attenuation

Starting from the basic phenomena of direct and inverse magnetostriction, the status of art of actual application and material development are critically reviewed. Important developments in noise detection and control are pointed out and several innovations are also reported. On the other hand, the crucial improvements to be performed in material performance, devices techniques and modeling are clearly discussed. In particular the first characterization of a new device, based on a novel composite material made of magnetic particles dispersed in an elastic matrix, able of self-attenuation of vibrations also at the resonance frequency, is reported and discussed. Since some problems in vibration control are related to the induction of a spontaneous acoustic mode in the core of the device used for the oscillations detection and/or attenuation, this new system appears to be very interesting for the researchers community involved in noise control and monitoring.