Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Daimler Ag

Jan Krueger

Philip Leistner

Helmut V Fuchs

Asmir Salkic

Margit Veeh

Mirko Sretenovic

Stephan Goettker

Roland Lippold

A three-dimensionally shaped body module component and a method for the production thereof, which is assembled from a plurality of body module segments (). The body module segments () are sections of continuously pultruded fiber plastic composite pultrudates, wherein each pultrudate has a basic structure consisting of endless fibers () laid in accordance with the force flux with respect to a predetermined geometry of the component. Furthermore, the basic structure has at least one passage () per body module segment () for receiving a connecting means (), so as to connect at least two of the body module segments (). The fibers () laid in accordance with the force flux are laid around the passage (), and, furthermore, a stabilization structure () made from fibers is arranged around it.

Body module component, and method for the production thereof

A component such as a vehicle exterior part having a transparent area without creating gaps is produced by introducing a hole into a film for the transparent area, inserting the film into a component mold, and then back-molding the same with a transparent plastic material in the mold such that the hole is filled with the transparent plastic material.

Vehicle film component, and method for the production thereof

The invention relates to a controlled acoustic wave guide configured as an elongated hollow chamber () which via an opening () in its first face end () is connected to a sound-conducting channel (). The longitudinal resonances of the hollow chamber () can be adjusted to a sound spectrum to be dampened. To this end diaphragm vibrations are detected by means of a microphone () which is positioned directly in front of the diaphragm () of at least one loud-speaker () at the second face-end () of the hollow chamber (). The microphone signal is then inverted using an amplifier () and fed back to the loud-speaker () after amplification in accordance with a sensor () signal characterizing the sound spectrum in the channel ().

Controlled acoustic waveguide for soundproofing

A reactive sound attenuator which includes a sensor for detecting a sound parameter in a space, e.g. a duct, consists of a signal amplifier that is used to amplify a detected signal, an electroacoustic transducer and a cavity with at least one membrane. The membrane, which is capable of moving in a vibratory manner, is part of a wall of a space, e.g. a duct wall. A sensor, which is disposed in the immediate vicinity of, in or on the membrane, detects the vibrations of the membrane. The sensor's signal, which is amplified and inverted by the amplifier, controls the membrane vibration via the electroacoustic transducer.

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Stuttgart, Germany

Jan Krueger