def writeSeparatedSignals(self, suffix='.wav'):
        """Writes the separated signals to the files in self.files.
        If suffix contains 'VUIMM', then this method will take
        the WF0 and HF0 that contain the estimated unvoiced elements.
        """
        if 'VUIMM' in suffix:
            WF0    = self.SIMMParams['WUF0']
            HF0    = self.SIMMParams['HUF0']
        else:
            WF0    = self.SIMMParams['WF0']
            HF0    = self.SIMMParams['HF0']