Active vibratory noise control apparatus for cancelling noise inside a vehicle

摘要

An active vibratory noise control apparatus has a speaker (43; 43-1) driven by an amplifier (42; 42-1) for canceling vibratory noise in the passenger compartment of a vehicle, the speaker being used as a speaker of one of different audio devices (40; 60) that can be installed on the vehicle. Each of the audio devices has a command key switch assembly (45). When the command key switch assembly (45) is operated to turn off transistor (47), a control signal is applied to a switching control circuit (7) in an active vibratory noise control unit (30-1), which identifies the audio device installed on the vehicle. The active vibratory noise control unit (30-1) generates a canceling signal matching characteristics of the speaker (43; 43-1) and / or amplifier (42; 42-1)of the identified audio device for canceling vibratory noise in the passenger compartment.