Abstract: A noise reduction system for connecting a noise source with a body, having at least one piezoactuator for suppressing a noise transmission from the noise source to the body. The noise reduction system has a first carrying structure to be connected with the noise source and a second carrying structure to be connected with the body. The at least one piezoactuator is positioned in series with the carrying structures and connects them with each other, such that the at least one piezoactuator forms a structural loaded part.

Abstract: A device for treating plastic parts for use in dental and orthodontic applications includes a pressure receptacle which has walls which define a hollow interior with an opening which is closable by a cover or lid. A support for material to be treated is placed within the hollow interior at a spaced location in the interior walls and adjacent a heating device which is advantageously an electric heating element. The device includes a rotatable fan which is advantageously mounted on the vessel as a shaft which extends through the vessel interior and carries a rotatable fan which is rotated so as to direct a gas such as air past objects held on a support and past the heater which maintains the circulating gases at a temperature which permits polymerization of the parts. The heating air is continuously circulated and it is heated by the heater sufficiently to maintain a selected polymerization temperature.