A system determines a power spectral density associated with {HEAD ~ an audio signal} that includes {TAIL ~ a speech signal} and a noise signal 
includes
A system determines a power spectral density associated with { HEAD ~ an audio signal } that includes { TAIL ~ a speech signal } and a noise signal
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH