Ambient noise sense auto-correction audio system

An audio noise calibration circuit, comprising:

• a speaker, the speaker including a driver input;
• a switch having a first terminal, a second terminal, and an output, and wherein
• the switch is adapted to be responsive to a switching signal having at least a first switching state and a second switching state such that
• the first terminal of the switch is connected to the output of the switch when the switching signal is in the first switching state such that there is electrical connectivity between the first terminal and the output, and
• the second terminal of the switch is connected to the output of the switch when the switching signal is in the second switching state such that there is electrical connectivity between the second terminal and the output, and further wherein
• the output of the switch is connected to the driver input of the speaker;
• and
• an audio processing unit adapted to
• generate the switching signal such that when in the first switching state, an audio signal generated by the audio processing unit is transferred to the first terminal and then to the driver input of the speaker to be broadcast,
• generate the switching signal such that when in the second switching state, the driver input of the speaker is connected to a first portion of the audio processing unit such that the speaker operates as a microphone to acquire ambient noise sound, and an electrical output of the microphone that represents the ambient noise sound is processed by the first portion of the audio processing unit to generate a digitized ambient noise sound, and
• modify a next output audio signal based on the digitized ambient noise sound, wherein
• the audio processing unit is further adapted to modify the next audio signal based on a comparison between the next audio signal and the digitized ambient noise sound, and further wherein the audio processing unit is further adapted to modify the next audio signal by
• generating a frequency analysis of the next audio output signal and the digitized ambient noise signal such that a first plurality of frequency bands is determined for the next audio output signal and a second plurality of frequency bands is determined for the digitized ambient noise signal,
• determining which of the first plurality of frequency bands of the next audio signal substantially overlap the second plurality of frequency bands of the digitized ambient noise signal, and
• generating a first plurality of gain factors to be applied to the next audio output signal for the substantially overlapping frequency bands.