Patent ID: 7155019

Claim:
An adaptive directional sound processing system, comprising: at least first and second microphones spaced apart by a predetermined distance, said first microphone producing a first electronic sound signal and said second microphone producing a second electronic sound signal; a first minimum estimate circuit operatively coupled to said first microphone, said first minimum estimate circuit produces a first minimum estimate for the first electronic sound signal from said first microphone; a second minimum estimate circuit operatively coupled to said second microphone, said second minimum estimate circuit produces a second minimum estimate for the second electronic sound signal from said second microphone; a divide circuit operatively connected to said first and second minimum estimate circuits, said divide circuit operates to produce a scaling signal from the first and second minimum estimates; a multiply circuit operatively connected to said divide circuit and said second microphone, said multiply circuit operates to multiply the second electronic sound signal by the scaling signal to produce a scaled second electronic sound signal; and a subtraction circuit operatively connected to said multiply circuit and said first microphone, said subtraction circuit producing an output difference signal by subtracting the scaled second electronic sound signal from the first electronic sound signal.