Plastic structures for obfuscation of sonar signature returns and related techniques

Abstract

Techniques are disclosed for modifying the acoustic signature of plastic structures. An example structure implementing the techniques includes an inner wall forming an inner shell of the structure, the inner wall having a first edge and a second edge opposing the first edge, and an outer wall forming an outer shell of the structure, the outer wall having a first edge and a second edge opposing the first edge. The structure also includes an upper wall member joining the first edge of the inner wall to the first edge of the outer wall and a lower wall member joining the second edge of the inner wall to the second edge of the outer wall to form a wall cavity, an infill structure within the wall cavity, and at least two holes in the structure providing an opening from an exterior of the structure to the wall cavity.

Dependencies are inferred from the claim text.