repeating the steps of measuring, identifying and displaying at intervals during {HEAD ~ the transforming} of the elemental sound units to {TAIL ~ audio signals} 
to
repeating the steps of measuring , identifying and displaying at intervals during { HEAD ~ the transforming } of the elemental sound units to { TAIL ~ audio signals }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL