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This second edition of a bestseller covers traditional speech enhancement algorithms such as spectral subtraction and Wiener filtering algorithms as well as state-of-the-art algorithms including minimum mean squared error algorithms that incorporate signal-presence uncertainty and subspace algorithms that incorporate psychoacoustic models. The coverage includes objective and subjective measures used to evaluate speech quality and intelligibility. This new edition contains a new chapter on speech intelligibility, and updates each chapter, and an updated DVD to be included with the book.