Auditory perception property-based signal subspace microphone array voice enhancement method

The invention discloses an auditory perception property-based signal subspace microphone array voice enhancement method, which fully combines auditory masking effect of human ears based on the traditional microphone array signal subspace voice enhancement method. The algorithm core of the signal subspace is to reasonably estimate a linear filter, and the key point of the algorithm comprises the following steps: accurately estimating the dimensionality and noise power spectrum of the signal subspace, and reasonably estimating a Lagrangian multiplier. Therefore, the invention provides a feasible solution, which comprises the following steps: performing time domain alignment, short-time Fourier transform and power spectrum characteristic value decomposition on signals acquired by a microphone array; determining the dimensionality of a noise subspace by hypothesis testing; estimating a noise power spectrum by a conditional probability method in the noise subspace; estimating an auditory masking threshold value based on the signal subspace; and estimating the linear filter by combining the Lagrangian multiplier according to the auditory perception property.