Abstract: A method for reducing noise in at least one monitor position in a vehicle compartment by actively controlling the power of a primary noise (dm(t)) as sensed at two or more control positions in the vehicle compartment, the method comprising the updating of filter coefficient(s) of (an) adaptive filter(s) (w(n)) based on variable contribution of error sensors and actuator(s) for different noise source operating conditions.

Abstract: A method for reducing noise in at least one monitor position in a vehicle compartment by actively controlling the power of a primary noise (dm(t)) as sensed at two or more control positions in the vehicle compartment, the method comprising the updating of filter coefficient(s) of (an) adaptive filter(s) (w(n)) based on variable contribution of error sensors and actuator(s) for different noise source operating conditions.

Abstract: An active buffeting noise control arrangement for a vehicle having one or more window panels of a vehicle cabin. One or more actuators are positioned at or near the one or more window panels and are operable to selectively vibrate the one or more windows in order to generate sound waves that will counteract a low frequency throb or buffeting event. The arrangement further includes one or more sensors in a vehicle cabin for detecting the buffeting event in transmitting sensor data to a control module. The control module is connected to the one or more sensors as well as the one or more actuators where the control module receives the sensory data, determines if a buffeting event is occurring and commands the one or more actuator assemblies to vibrate the window and generate sound waves that are operable to counteract the buffeting event.

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).