1. A monaural speech intelligibility predictor adapted for receiving an information signal x comprising either a clean or noisy and/or processed version of a target speech signal, the speech intelligibility predictor being configured to provide as an output a speech intelligibility predictor value d for the information signal, the speech intelligibility predictor comprising an input that provides a time-frequency representation x(k,m) of said information signal x, k being a frequency bin index, k=1, 2,. .. , K, and m being a time index; an envelope extractor that provides a time-frequency sub-band representation x j (m) of the information signal x representing temporal envelopes, or functions thereof, of frequency sub-band signals x j (m) of said information signal x, j being a frequency sub-band index, j=1, 2,. .. , J, and m being the time index; a time-frequency segment divider that divides said time-frequency representation x j (m) of the information signal x into time-frequency segments X m corresponding to a number N of successive samples of said sub-band signals; a segment estimator that estimates essentially noise-free time-frequency segments S m or normalized and/or transformed versions {tilde over (S)} m thereof, among said time-frequency segments X m , or normalized and/or transformed versions {tilde over (X)} m , thereof, respectively; a normalizer and/or transformer configured to provide at least one normalization and/or transformation operation of rows and at least one normalization and/or transformation operation of columns of said time-frequency segments S m and X m ; an intermediate speech intelligibility calculator adapted for providing intermediate speech intelligibility coefficients d m estimating an intelligibility of said time-frequency segment X m , said intermediate speech intelligibility coefficients d m being based on sample correlation coefficients between row elements or column elements or all elements of said estimated, essentially noise-free time segments S m or said normalized and/or transformed versions {tilde over (S)} m thereof, and said time-frequency segments X m , or said normalized and/or transformed versions {tilde over (X)} m thereof, respectively; a final speech intelligibility calculator that calculates a final speech intelligibility predictor d estimating an intelligibility of said information signal x by combining said intermediate speech intelligibility coefficients d m , or a transformed version thereof, over time.