public List<Double> shortTermZeroCrossingRate(List<Double> window, List<Double> scaledSamples){
		List<Double> temp = new ArrayList<Double>();
		List<Double> zcr = new ArrayList<Double>();
		List<Double> horzAxisCrosses = new ArrayList<Double>();
		for(int i=1; i<scaledSamples.size(); i++){
			horzAxisCrosses.add( Math.abs( Math.signum(scaledSamples.get(i)) - Math.signum(scaledSamples.get(i-1)) ));
		}
		temp = convolution(window, horzAxisCrosses);
		for(int i=0; i<temp.size();i++){
			zcr.add(temp.get(i)/ (2*window.size()) );
		}
		return zcr;
	}