voice) is the target signal and the second one (woman s voice) is the interfering speaker. To contrast the effects of an interference speaker (non-stationary noise) with a white noise inference (stationary noise/constant power) a white noise signal is also used. These signals are then scaled (varying SNR) to illustrate Good intelligibility (~.6), barely intelligible (~.2), and unintelligible (.1). The output of the script plots the Speech intelligibility Index for 100 ms windows over the speech signal, and displays the computed mean and standard deviation of SII (for active speech, silence intervals were excluded). Users can change the envelope threshold which is used to remove the Functions required from Array Toolbox 1. intel.m 2. spectrumlevel.m 3. sii.m 4. rmsilence.m 2 Data Files required Written by Arulkumaran Muthukumarasamy (arulkumaran@uky.edu) July 2008

testscript_intel.m

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