{HEAD ~ a first filter bank} receiving an input signal and providing frequency estimates for an initial indication of a presence of {TAIL ~ each} of said targeted frequencies 
{ HEAD ~ a first filter bank } receiving an input signal and providing frequency estimates for an initial indication of a presence of { TAIL ~ each } of said targeted frequencies
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH