Before revision:  The recitations as well as the speech were analyzed with the help of a latest non linear technique called Detrended Fluctuation Analysis  that gives a scaling exponent  , which is essentially the measure of long range correlations present in the signal.
After revision:  The recitations as well as the speech were analyzed with the help of a latest non linear technique called Detrended Fluctuation Analysis that gives a scaling exponent \alpha , which is essentially the measure of long range correlations present in the signal.