Abstract: A non-destructive testing (NDT) system including: a flexible ultrasound array including an array surface; a controller for controlling the flexible ultrasound array; and an actuatable soft robot system comprising an actuator mechanism for actuating the flexible ultrasound array to modify a shape of the array surface of the flexible ultrasound array.

Abstract: A multi-input, multi-output phononic system including a first interface surface and a second interface surface that respond to at least one of a pressure gradient or a velocity gradient in a wave of a turbulent fluid flow or a laminar fluid flow, the pressure gradient or the velocity gradient associated with complex motion of the flow exhibiting a plurality of frequencies exerted on one or more of the interface surfaces; and a subsurface feature extending from the interface surfaces, the subsurface feature comprising a phononic crystal or locally resonant metamaterial adapted to receive one or more of the pressure gradient or the velocity gradient from the fluid flow via the interface surfaces and to alter one or more of a phase and an amplitude of a plurality of frequency components of the fluid flow.