US 11,056,090 B2
Elastic material for coupling time-varying vibro-acoustic fields propagating through a medium
Theodore P. Martin, Delmar, NY (US); Charles Alan Rohde, Brentwood, MD (US); Gregory Orris, Kensington, MD (US); Kristin Charipar, Alexandria, VA (US); and Alberto Piqué, Crofton, MD (US)
Assigned to The Government of the United States of America, as represented by the Secretary of the Navy, Washington, DC (US)
Filed by The Government of the United States of America, as represented by the Secretary of the Navy, Arlington, VA (US)
Filed on Jul. 31, 2018, as Appl. No. 16/49,943.
Claims priority of provisional application 62/538,933, filed on Jul. 31, 2017.
Prior Publication US 2019/0035374 A1, Jan. 31, 2019
Int. Cl. G10K 11/162 (2006.01); G10K 11/02 (2006.01); G10K 11/04 (2006.01); G10K 11/20 (2006.01)
CPC G10K 11/162 (2013.01) [G10K 11/02 (2013.01); G10K 11/04 (2013.01); G10K 11/205 (2013.01); G10K 2200/11 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A device for use in a medium comprising a medium vibro-acoustic impedance, the device comprising:
an elastic material comprising a plurality of unit cells, said plurality of unit cells comprising a first unit cell, said first unit cell comprising:
a first unit-cell joint comprising a first unit-cell joint wall defining a first joint central void;
a first unit-cell joint inclusion located in the first joint central void; and
at least two first unit-cell arms connected to and extending away from said first unit-cell joint;
wherein said elastic material comprises an elastic-material vibro-acoustic impedance, said elastic-material vibro-acoustic impedance and the medium vibro-acoustic impedance being sufficiently vibro-acoustically impedance-matched to couple time-varying, propagating vibro-acoustic fields between said elastic material and the medium,
wherein said first joint wall comprises at least one of a first semiconductor, a first metal, a first metal alloy, a first polymer, a first foam, a first gel, a first rubber, a first elastic composite, and a first ceramic,
wherein said first unit-cell joint inclusion comprises at least one of a second semiconductor, a second metal, a second metal alloy, a second polymer, a second foam, a second gel, a second rubber, a second elastic composite, a second ceramic, and a first unit-cell joint inclusion fluid,
wherein said at least two first unit-cell arms comprise at least one of a third semiconductor, a third metal, a third metal alloy, a third polymer, a third foam, a third gel, a third rubber, a third elastic composite, and a third ceramic.