Patent ID: 8315413
Filing Date: 2012-11-20
Classification: H04B

Abstract:
1. An apparatus comprising: a first earpiece into which a first acoustic driver is disposed; a second earpiece into which a second acoustic driver is disposed; and a mixing circuit structured to mix a first channel of a two-channel audio of a first audio device with a single channel of audio from a second audio device to be acoustically output by the first acoustic driver, and to enable a second channel of the two-channel audio of the first audio device to be acoustically output by the second acoustic driver, wherein the mixing circuit is a passive mixing circuit that comprises a first resistor and a second resistor; the first resistor is coupled to the second resistor at a first common node to mix the first channel of the two-channel audio provided through the first resistor with the single channel of audio provided through the second resistor; and the first and second resistors cooperate to attenuate each of the first channel of the two-channel audio and the single channel of audio as acoustically output by the first acoustic driver at a time when the first channel of the two-channel audio is provided as a first audio signal driven by the first audio device with characteristics consistent with a first voltage source having low impedance and the single channel of audio is provided as a second audio signal driven by the second audio device with characteristics consistent with a second voltage source having low impedance.