Silvia Tomaschko

Method and system for influencing possible structure-borne sound conductions and possible noise radiations of objects

A method and a system for influencing possible structure-borne sound conductions and possible noise radiations of objects which have at least two at least indirectly mutually adjoining and mutually connected components. A spacer body is arranged in the area of the at least indirect mutual adjoining “contact area”. As the result of the spacer body, which can be controllably influenced in its geometry, one of the two mutually connected components and the components which, with respect to the conduction of the structure-borne sound have different acoustic impedances can be excited in a simple manner to carry out vibrations.

Method and apparatus for influencing background noise of machines having rotating parts

A method and a shaft bearing for influencing machine background noise emitted by at least by one rotating part of the machine, especially for influencing the background noise within a passenger compartment of a motor vehicle. The amplitudes and/or the frequencies of primary vibrations which cause the background noise are preferably lessened and/or supplemented by controlled external interventions. The mounting conditions between the shaft bearing and a rotating part held in the machine shaft bearing, especially a shaft, is varied by a radial adjustment unit having piezo elements. The transfer function of the vibrations, especially the vibrations producing the sound waves, present between the rotating part and the shaft bearing or a component in contact with the shaft bearing, is varied.