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Home >> Hummer >> 2008 >> H3 Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 361 (Cellular System, Entertainment System, And Navigation System) >> Diagnostic Information and Procedures >> Noise Compensated Volume Inoperative >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2009 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The audio amplifier supplies 9 volts to the noise compensation microphone. The audio amplifier receives a signal from the noise compensation microphone to determine the amount of interior vehicle noise and adjusts the amplifier output to the speakers accordingly.

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