said method being characterized in that energy applied to the creation of said pulses is reduced by reducing the amplitudes of the transmitted pulses when {HEAD ~ the distance} between said transducer and {TAIL ~ said surface} is less than a defined distance and the amplitudes of said echo signals exceed a pre defined amplitude 
said method being characterized in that energy applied to the creation of said pulses is reduced by reducing the amplitudes of the transmitted pulses when { HEAD ~ the distance } between said transducer and { TAIL ~ said surface } is less than a defined distance and the amplitudes of said echo signals exceed a pre defined amplitude
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 REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH