  Factoring the pressure field of a harmonic sound wave into its amplitude and
phase profiles provides the foundation for an analytical framework for studying
acoustic forces that not only provides novel insights into the forces exerted
by specified sound waves, but also addresses the inverse problem of designing
sound waves to implement desired force landscapes. We illustrate the benefits
of this acoustokinetic framework through case studies of purely nonconservative
force fields, standing waves, pseudo-standing waves, and tractor beams.
