A method for accommodating device mismatch attributable to sensor sensitivity differences and/or differences in sensor amplifiers and A/D channels in a sensor array system that uses phase difference enhancement to improve noise discrimination and that includes a plurality of sensors configured to generate a corresponding plurality of input signals that are each represented by an input vector (A,B) having a phase component and a magnitude component, the method comprising: - generating a first input signal and a second input signal respectively from a first sensor and a second sensor of said plurality of sensors; - obtaining first and second magnitude-matched vectors from magnitudes of a first input vector representing the first input signal and a second input vector representing the second input signal, the first and second magnitude-matched vectors having a magnitude that is substantially equal to one of the following mathematical means: an arithmetic mean, a geometric mean, a harmonic mean, or a root-mean-square of the magnitudes of the two input vectors, and having, respectively, phases corresponding to the phases of the first and second input vectors, the method further comprising: enhancing a phase difference of the first and second input vectors, said enhancing including increasing or decreasing an input phase difference of the first and second input vectors to thereby improve directionality by increasing or decreasing null width in a sensitivity pattern of the sensor array; distributing the enhanced phase difference over one or both the first and second magnitude-matched vectors so that their combined phase difference is equal to the enhanced phase difference, to generate enhanced first and second magnitude-matched vectors; and combining the enhanced first and second magnitude-matched vectors. - generating a first input signal and a second input signal respectively from a first sensor and a second sensor of said plurality of sensors; - obtaining first and second magnitude-matched vectors from magnitudes of a first input vector representing the first input signal and a second input vector representing the second input signal, the first and second magnitude-matched vectors having a magnitude that is substantially equal to one of the following mathematical means: an arithmetic mean, a geometric mean, a harmonic mean, or a root-mean-square of the magnitudes of the two input vectors, and having, respectively, phases corresponding to the phases of the first and second input vectors, the method further comprising: enhancing a phase difference of the first and second input vectors, said enhancing including increasing or decreasing an input phase difference of the first and second input vectors to thereby improve directionality by increasing or decreasing null width in a sensitivity pattern of the sensor array; distributing the enhanced phase difference over one or both the first and second magnitude-matched vectors so that their combined phase difference is equal to the enhanced phase difference, to generate enhanced first and second magnitude-matched vectors; and combining the enhanced first and second magnitude-matched vectors. enhancing a phase difference of the first and second input vectors, said enhancing including increasing or decreasing an input phase difference of the first and second input vectors to thereby improve directionality by increasing or decreasing null width in a sensitivity pattern of the sensor array; distributing the enhanced phase difference over one or both the first and second magnitude-matched vectors so that their combined phase difference is equal to the enhanced phase difference, to generate enhanced first and second magnitude-matched vectors; and combining the enhanced first and second magnitude-matched vectors.