The method further includes generating a pre modification output signal, low pass filtering the pre modification signal, and modulating the pre modification signal up to {HEAD ~ a modulation frequency} to generate {TAIL ~ the modification signal} 
The method further includes generating a pre modification output signal , low pass filtering the pre modification signal , and modulating the pre modification signal up to { HEAD ~ a modulation frequency } to generate { TAIL ~ the modification signal }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL