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Correspondence investigates noise reduction performance in differential microphone arrays, indicating significant implications for audio technology.
In this correspondence, we study the performance of differential microphone arrays (DMAs) in terms of noise reduction, speech distortion, and signal-to-noise ratio (SNR) gain. We also investigate their beampatterns and array gains. We start by establishing the expressions of these performance measures involving general derivatives of the channel transfer functions. Afterwards, we specify our results in the case of anechoic near-field and far-field propagation models.
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Benesty et al. (2011) studied this question.
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