Patent ID: 6782108
Filing Date: 2004-08-24
Classification: H04H

Abstract:
An amplifier device for use with a headphone comprising:a first input terminal that receives a first audio signal from an external source; a first output terminal that provides said first audio signal, received via said first input terminal, to outside said amplifier device; a second input terminal that receives a second audio signal from an external source; a mixing circuit that mixes said first and second audio signals received via said first and second input terminals, said mixing circuit including an operator for adjusting mixing levels of said first and second audio signals; and a second output terminal that supplies an output from said mixing circuit to said headphone, wherein said first output terminal is connected to an input of an audio mixer device and said second input terminal is connected to an output of the audio mixer device, and wherein an output signal from the audio mixer device is received by said second input terminal as said second audio signal.