{TAIL ~ The switching frequency} has {HEAD ~ an audible frequency range} that results in unacceptable audible noise that is reduced by the present invention 
{ TAIL ~ The switching frequency } has { HEAD ~ an audible frequency range } that results in unacceptable audible noise that is reduced by the present invention
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH