Method and apparatus for acoustic detection of buried objects

Method and apparatus for acoustically measuring the level of liq

Method and apparatus for active sonar detection enhancement

Method and apparatus for coherent burst ranging

Method and apparatus for correlation sonar

Method and apparatus for detecting and counting articles

Method and apparatus for detecting intrusion and...

Method and apparatus for detecting position of object with ultra

Method and apparatus for detecting the location of a marine pipe

Method and apparatus for detection of insoluble sinking pollutan

Method and apparatus for determining bedload thickness employing

Method and apparatus for determining soil strength from Doppler-

Method and apparatus for determining the length of tubular membe

Method and apparatus for determining the local velocities in a m

Method and apparatus for determining the position of a mobile ap

Method and apparatus for echo transit time determination

Method and apparatus for echolocation

Method and apparatus for eliminating substantially false...

Method and apparatus for fault-tolerant, correlation SONAR...

Method and apparatus for fixed target echo suppression in distan