Acoustic levitation is the force of sound waves are
used to suspend, position or manipulate an object such as a solid or liquid. Levitated objects can be easily moved from one position to another in any direction and without regard to the confines of an enclosure or
temperature variations. The levitated object can be conveyed along a line by making a continuous change in relative phase, or the object can be moved in one direction and then in the reverse direction, and at fixed and
variable rates of speed. Rapid, small reversing changes in relative phase can be used, for example, to vibrate the object. An acoustic levitator uses a pair of opposed sound sources which have interfering sound waves
producing acoustic energy wells in which an object may be levitated. The phase of one sound source may be changed relative to the other in order to move the object along an axis between the sound sources. The potential
practical applications for acoustic levitation are numerous and varied. Many potential applications exist whenever there is a need to hold, move, store, position, or process an object without contact with any surface,
particularly if contact would damage or contaminate the object or interfere with a property or state of the object. The application of acoustic forces to a levitated object offer the relatively simple control of
object position, shape, and other characteristics. Plans only.