In this paper, a programmable piezoelectric meta-shell is designed to actively control the
structural and sound radiation responses. The meta-shell consists of a cylindrical shell …

The shape of the tympanic membrane (TM) plays an important role in sound transmission
through the ear for hearing. Previously we developed a high-speed holographic system …

In this paper, a programmable piezoelectric meta-ring equipped with high-order digital
shunting circuits is designed for vibro-acoustic control. The structural and acoustic …

The “electrical activity” of certain crystalline materials has been known to a mankind for
several hundred years. The electro-mechanical phenomena in crystals were studied with the …

It is a well-known fact that glass windows and facades, car chassis, airplane fuselages and
similar large planar structures have usually a low sound shielding efficiency due their low …

Noise pollution has become one of the most deteriorating parameters of the environment.
Considerable part of noise is transmitted into interiors of buildings through vibrating large …

In this paper we propose a time average digital holographical arrangement employing
frequency shift of reference wave and its phase modulation. It results in Phase Modulated …

The Dissertation focuses is focused on a basic research of design methods and fundamental
properties of active acoustic and mechanical metamaterials and on a research of method for …

We report on the development of a method for the measurement of the effective stiffness of a
piezoelectric transducer which is bonded to a vibration control system and operated using …