Placement of Multiple Feedforward Microphones in an Active Noise Reduction (ANR) System

An active noise reduction (ANR) headset earpiece comprising:

• a first microphone disposed on the ANR headset earpiece such that the first microphone is configured to capture a first input signal representing noise traversing a first noise pathway through the ANR headset earpiece;
• and
• a second microphone disposed on the ANR headset earpiece such that the second microphone is configured to capture a second input signal representing noise traversing a second noise pathway through the ANR headset earpiece,
• wherein at least one of the first and second noise pathways comprise an acoustic path through a port of the headset earpiece, and
• wherein positions of the first microphone and the second microphone on the ANR headset earpiece are configured such that a first target level of coherence is achieved at multiple frequencies, the first target level of coherence at a particular frequency representing a fraction of an output signal that can be suppressed using the first input signal and the second input signal together.