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