Headphone with multiple reference microphones ANC and transparency

A headset comprising:

• a first internal microphone, a first speaker, one or more first external microphones, and a first processing circuitry in a housing of a first ear cup;
• and
• a second internal microphone, a second speaker, a plurality of second external microphones, and a second processing circuitry in a housing of a second ear cup;
• the first processing circuitry being configured to produce a) ANC audio output for acoustic noise cancellation based on i) a first external microphone signal from the one or more first external microphones and ii) a first internal microphone signal from the first internal microphone, and b) transparency audio output for transparency based on the first external microphone signal, and
• the first processing circuitry is further configured to determine a digital filter in the transparency audio output, based on i) the first processing circuitry processing the first internal microphone signal and ii) a result of the second processing circuitry processing a second internal microphone signal from the second internal microphone, wherein the result is transmitted from the second ear cup to the first processing circuitry of the first ear cup.

A headphone comprising:

• an ear cup housing having an outside face, an inside face and a perimeter sidewall, wherein the outside face is spaced apart from the inside face by the perimeter sidewall;
• at least three external microphones integrated in the ear cup housing that are disposed on the perimeter sidewall of the ear cup housing;
• an internal microphone and a speaker that are disposed on the inside face of the ear cup housing;
• and
• processing circuitry configured to i) drive the speaker for acoustic noise cancellation by processing a) at least one external microphone signal from the at least three external microphones and b) an internal microphone signal from the internal microphone, and ii) drive the speaker for transparency by processing at least one external microphone signal from the at least three external microphones.