Micro-bubbles filled with gas and surrounded by a thin elastic shell are used as contrast agents in medical imaging with ultrasound. The interest in using the micro-bubbles for blood pressure measurements in the left ventricle of the heart and other organs has been raised in the last years. This task requires better understanding of the micro-bubbles properties driven by acoustic force and the conditions for creation of non-linear effects such as appearance of half-harmonic component in the signal radiated from the micro-bubbles. This work uses laboratory experiments in order to investigate...