demo_joergensen2013 computes the signal-to-noise envelope-power ratio (SNRenv) for a speech sentence in noise at an SNR of -3 dB. The SNRenv can be then used to predict speech intelligibility.
Pcorrect indicates the probability of correctly understanding the sentence based on results from Joergensen et al. (2013).
This code produces the following output:
SNRenvs_noIOparameters = 91.4732 SNRenvs_withIOparameters = 91.4732 Pcorrect = 99.8131
S. Joergensen and T. Dau. Predicting speech intelligibility based on the signal-to-noise envelope power ratio after modulation-frequency selective processing. J. Acoust. Soc. Am., 130(3):1475-1487, 2011.