A HENDHELD DEVICE

The present invention relates to a method for tracking variations in distance D calculated from time-of -flight measurements of a sequence of pulses of a pressure wave oscillation from a transmitter to a receiver, the pressure wave oscillation having a given wavelength and wave period, the method comprising; (g) e...

A rangefinder, for locating an object moving parallel to a planar surface, is rigidly attached to a carrier that is pivotably movable between an obverse position and a reverse position relative to a planar surface. Preferably, an orienting mechanism is provided for determining which position, obverse or reverse, the...

An ultrasound receiver (20) includes a hollow cylinder (22) formed primarily from flexible piezoelectric film, the hollow cylinder (22) having an outer surface (24) an inner surface (26), a central axis (28) and a height measured parallel to the central axis (28). A sensing electrode is formed from conductiv...