dawn@0: function E = ShortTimeEnergy(signal, windowLength, step);
dawn@0: signal = signal / max(max(signal));
dawn@0: curPos = 1;
dawn@0: L = length(signal);
dawn@0: numOfFrames = floor((L-windowLength)/step) + 1;
dawn@0: %H = hamming(windowLength);
dawn@0: E = zeros(numOfFrames,1);
dawn@0: for (i=1:numOfFrames)
dawn@0:     window = (signal(curPos:curPos+windowLength-1));
dawn@0:     E(i) = (1/(windowLength)) * sum(abs(window.^2));
dawn@0:     curPos = curPos + step;
dawn@0: end