Systems and methods for controlling acoustical damping

Details Systems and methods for controlling acoustical damping Systems and methods for controlling acoustical damping

2008-04-15

2008-04-15

Donovan, Lincoln (Department: 2837)

Acoustics

Sound-modifying means

Muffler, fluid conducting type

C181S278000, C181S271000, C181S277000, C181S276000, C123S184590, C381S071400, C381S086000

Reexamination Certificate

active

11096166

ABSTRACT:
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.

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