Patent ID: 8130979

Claim:
A microphone system comprising: a base; a first microphone apparatus coupled to the base, the first microphone apparatus capable of producing a first output signal having a noise component; a second microphone apparatus coupled to the base, the second microphone apparatus capable of producing a second output signal; and combining logic operatively coupled with the first microphone apparatus and the second microphone apparatus, the combining logic using the second output signal to remove at least a portion of the noise component from the first output signal, the first microphone apparatus comprising a first microphone, the second microphone apparatus comprising a second microphone, the second microphone being configured to form an acoustic high pass filter having a low frequency cut-off that is greater than the low frequency cut-off of the first microphone, the second microphone being logically shielded from input audio signal, wherein the first microphone has a first diaphragm and a first circumferential gap defined at least in part by the first diaphragm, the second microphone having a second diaphragm and a second circumferential gap defined at least in part by the second diaphragm, the second circumferential gap greater than the first circumferential gap.