The method 1, wherein the two different frequencies are {HEAD ~ a first frequency} of about 1 to {TAIL ~ about 100,000 Hz} and a second frequency of about 0.0001 to about 10 Hz and the second frequency is lower that the first frequency 
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The method 1 , wherein the two different frequencies are { HEAD ~ a first frequency } of about 1 to { TAIL ~ about 100,000 Hz } and a second frequency of about 0.0001 to about 10 Hz and the second frequency is lower that the first frequency
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH