each frequency band is determined to affected by the noise when {HEAD ~ the absolute value} of {TAIL ~ the corrected real value} is below a predetermined threshold value 
of
each frequency band is determined to affected by the noise when { HEAD ~ the absolute value } of { TAIL ~ the corrected real value } is below a predetermined threshold value
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH