Abstract: The invention relates to an apparatus for mounting an object to a structure. The apparatus includes an elastic arrangement including at least two elastic partial arrangements. The two elastic partial arrangements are arranged at a distance in the direction of a main axis, and the two elastic partial arrangements are soft in the direction of the main axis and stiff in all directions orthogonal to the main axis. Each of the two elastic partial arrangements comprises an inner connection area close to the main axis and an outer connection area farther away from the main axis, and each of the two elastic partial arrangements comprises at least two leaf springs which extend between the inner connection area and the outer connection area and which are spirally wound into each other within a common leaf plane.

Abstract: The invention relates to an apparatus for mounting an object to a structure. The apparatus includes an elastic arrangement including at least two elastic partial arrangements. The two elastic partial arrangements are arranged at a distance in the direction of a main axis, and the two elastic partial arrangements are soft in the direction of the main axis and stiff in all directions orthogonal to the main axis. Each of the two elastic partial arrangements comprises an inner connection area close to the main axis and an outer connection area farther away from the main axis, and each of the two elastic partial arrangements comprises at least two leaf springs which extend between the inner connection area and the outer connection area and which are spirally wound into each other within a common leaf plane.

Abstract: The invention relates to a device for mounting an object to a structure in a vibration-free manner. The device has an elastic arrangement that supports the object at the structure in a stiff manner in the directions of at least two of the total of six translational and rotational degrees of freedom and in a soft manner in the directions of at least one of the total of six translational and rotational degrees of freedom. Main modes of motion of the object in the directions of the rigid support have natural frequencies that are higher than any main mode of motion of the object in any direction of the soft support at least by a factor of ten. The soft support is undamped, and a damping device is provided for any main mode of motion of the object in any direction of the soft support.

Abstract: The invention relates to a device for mounting an object to a structure in a vibration-free manner. The device has an elastic arrangement that supports the object at the structure in a stiff manner in the directions of at least two of the total of six translational and rotational degrees of freedom and in a soft manner in the directions of at least one of the total of six translational and rotational degrees of freedom. Main modes of motion of the object in the directions of the rigid support have natural frequencies that are higher than any main mode of motion of the object in any direction of the soft support at least by a factor of ten. The soft support is undamped, and a damping device is provided for any main mode of motion of the object in any direction of the soft support.

Abstract: The invention relates to an acoustically active device (1) comprising a substrate (2) that is transparent at least in a viewing region, comprising at least one first electrode (3) that lies on the substrate (2), comprising a piezoelectric layer (4) that lies on the at least one first electrode (3), and comprising at least one second electrode (5) that lies on the piezoelectric layer (4). The at least one first electrode (3) and the at least one second electrode (5) are transparent conductive oxide layers, and the piezoelectric layer (4) is made of a transparent piezoelectric material that extends over the entire surface of the viewing region.

Abstract: A sound absorber comprises an elongated gas channel, through which a flowing gas passes in operation of the sound absorber; and at least one helical fixture mounted in a longitudinal section of the gas channel. The helical fixture defines a helical gas passage through the longitudinal section of the gas channel. Further, the helical fixture defines at least one longitudinal Helmholtz resonator within the gas channel which is excited by sound waves propagating in the flowing gas passing through the at least one gas channel.

Abstract: A sound absorber comprises an elongated gas channel, through which a flowing gas passes in operation of the sound absorber; and at least one helical fixture mounted in a longitudinal section of the gas channel. The helical fixture defines a helical gas passage through the longitudinal section of the gas channel. Further, the helical fixture defines at least one longitudinal Helmholtz resonator within the gas channel which is excited by sound waves propagating in the flowing gas passing through the at least one gas channel.

Abstract: A method of making a structure having an optimized sterical shape of a material 4 comprises the steps of forming a pre-form 1 of the structure of the material 4, setting geometric boundary conditions for the material 4 being in a state in which it is able to rearrange under the influence of internal tensions in the volume of the pre-form 1 so that the material rearranges itself into the structure in a self-organized way, and transferring the rearranged material 4 into a state in which the rearrangement of the material 4 is conserved.

Abstract: A motor vehicle, particularly a convertible, with a vehicle body to which longitudinally moving struts are assigned and with a supporting frame which includes a longitudinally moving strut, is constructed so that at least one of the struts is constructed so that its length can be varied and has assigned to it an absorbing unit for determining a longitudinal stress, a control element for bringing about a counterforce as well as a control unit for the control element.