Systems and methods for controlling acoustical damping

摘要

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 acoustical damping device and stores a plurality of control patterns (A. B) for different levels of acoustical damping of the acoustical damping device. The selection device outputs a selection signal to the controller so that the controller controls the variable acoustical damping device based on one of the control patterns corresponding to the selection signal.