Patent ID: 8452029

Claim:
An audio system, comprising: an inverter, for receiving a first audio signal and inverting the first audio signal into an inverted audio signal; a first amplifier, for receiving the inverted audio signal from the inverter and multiplying the inverted audio signal by a first gain to generate a first compensating audio signal; a first mixer, for receiving a second audio signal and mixing the first compensating audio signal with the second audio signal to generate a first low-interference audio signal; a main speaker, for receiving and playing the first audio signal; a first audio output port, for receiving the first low-interference audio signal from the first mixer and transmitting the first low-interference audio signal to a first external speaker; a second amplifier, for receiving the inverted audio signal from the inverter and multiplying the inverted audio signal by a second gain to generate a second compensating audio signal; a second mixer, for receiving a third audio signal and mixing the second compensating audio signal with the third audio signal to generate a second low-interference audio signal; and a second audio output port, for receiving the second low-interference audio signal from the second mixer and transmitting the second low-interference audio signal to a second external speaker.