Abstract: A device for motor vehicles and a motor vehicle. The motor vehicle includes a support structure, which is mounted in the vehicle, and a steering wheel, which is rotatably connected to the support structure. The device includes a control unit and a sensor device, which is connected to the control unit. The sensor device is adapted to sense vibrations in the steering wheel and to provide a sensor signal related to the sensed vibrations. An actuator device is connected to the control unit and adapted to influence vibrations in the vehicle. The control unit is adapted to control the actuator device, with regard to the sensor signal, to act on the vehicle in such a way that a desired vibration character in the steering wheel is obtained.

Abstract: The invention refers to a device for reducing vibrations and sounds in a structure (1). The device comprises at least a dynamic element (4), which extends along two main axes and has a mass-moment of inertia, and at least a spring element (5) which is connected to the dynamic element (4) and which is adapted to be connected to the structure. The mass-moment of inertia is different with respect to the two main axes. The dynamic element is rotatable around an axis (x) of rotation, which is perpendicular to the two main axes.

Abstract: A device for motor vehicles and a motor vehicle. The motor vehicle includes a support structure, which is mounted in the vehicle, and a steering wheel, which is rotatably connected to the support structure. The device includes a control unit and a sensor device, which is connected to the control unit. The sensor device is adapted to sense vibrations in the steering wheel and to provide a sensor signal related to the sensed vibrations. An actuator device is connected to the control unit and adapted to influence vibrations in the vehicle. The control unit is adapted to control the actuator device, with regard to the sensor signal, to act on the vehicle in such a way that a desired vibration character in the steering wheel is obtained.

Abstract: The invention refers to a device for sound control in a space (2) with a sound field from at least one sound source (3). The device includes a pulse sensor (5), which provides a pulse signal from the sound source (3). Moreover, the device includes a number of sound influencing members (8) for reducing the sound field in the space (2) and a number of sound sensors (9), which sense the actual sound field in the space and provide an error signal. A control unit includes a signal supplied device (11, 12), which receives a pulse signal and supplies a first signal to an adaptive filter (15). The filter has a number of filter coefficients and generates a drive signal for each sound influencing member (8). The signals supply device also supplies second signals to a calculating member (24), which calculates the value of the filter coefficients by the second signals and the error signals for updating the adaptive filter (15).

Abstract: A device at an acoustic liner for an apparatus generating sound comprises means (12) adapted to enable changes of the value of the acoustic impedance of the liner.