An acoustic field may be produced from a transducer array having known relative positions
and orientations In this acoustic field, one or more control points may be defined. An …

Described herein are techniques for tracking objects (including human body parts such as a
hand), namely: 1) two-state transducer interpolation in acoustic phased-arrays; 2) …

The present invention concerns a method and apparatus for the modulation of an acoustic
field for providing tactile sensations. A method of creating haptic feedback using ultrasound …

Described is a system for producing an acoustic field from a plurality of ultrasonic transducer
arrays, each of which has known relative positions and orientations. The acoustic field …

A system providing various improved calibration techniques for haptic feedback is
described. An acoustic field is defined by one or more control points in a space within which …

Producing multiple independent fields from many phased acoustic transducers represents a
difficult computational problem. By first dividing up each field to its own group of transducers …

The properties of metamaterials are derived both from the inherent properties of their
constituent materials and from the geometrical arrangement of those materials …

A phased array of ultrasonic transducers may create arbitrary fields that can be utilized to
manipulate fluids. This includes the translation of drops on smooth surfaces as well …

An acoustic matching structure is used to increase the power radiated from a transducing
element with a higher imped ance into a surrounding acoustic medium with a lower acoustic …

Various techniques for driving phased array systems are described, specifically intended for
acoustic phased arrays with applications to mid-air haptics, parametric audio, acoustic …