A control system (10) controls a variable acoustical damping device (20) disposed in a sound producing channel (5) of a vehicle engine (1). The control system includes a controller (12) and a selection device (14). The controller is coupled to the variable...

The filter (3) is in a housing (2) having a sound absorbing membrane (4) in a moveable section (2b) of the housing having an air inlet (5). Vibration in he vertical direction (9) reduces the noise level generated before (7) the filter. The upper (2a) and l...