Abstract: This invention refers to a sonic and/or ultrasonic generator for emission in air with a power capacity and certain radiation characteristics which permit the necessary acoustic levels (>170 dB ref. 2.10?4 ?bar) to be obtained in a way that is safe and controlled for the mechanical breakage of high consistency bubbles constituting industrial foams.

Abstract: This invention refers to a sonic and/or ultrasonic generator for emission in air with a power capacity and certain radiation characteristics which permit the necessary acoustic levels (>170 dB ref. 2·10?4 ?bar) to be obtained in a way that is safe and controlled for the mechanical breakage of high consistency bubbles constituting industrial foams.

Abstract: The invention relates to a method and device for determining the fatigue resistance of metallic materials at ultrasonic frequencies and a constant temperature. The inventive method can be used to examine materials subjected to bending and traction/compression stresses at different temperatures ranging from atmospheric temperature to 1000° C. and at high frequency. Said method can be used to evaluate the breaking stress and the number of cycles to which the material has been subjected and to record the break profile. The device comprises an excitation system, a data acquisition system and resonant samples of the material.