The present invention, in contrast to the above described conventional uses of piezoelectric elements, imparts motion in {TAIL ~ a controlled manner} to prevent {HEAD ~ aliasing} as will be described in greater detail below 
The present invention , in contrast to the above described conventional uses of piezoelectric elements , imparts motion in { TAIL ~ a controlled manner } to prevent { HEAD ~ aliasing } as will be described in greater detail below
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 OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH