|1. A resonator for damping acoustic energy from a source in a liquid, the resonator comprising:
a base having a first planar surface and a second planar surface, said first and second planar surfaces parallel with one
a hollow body having, in a cross section orthogonal to said second planar surface of said base, a first end, a second end,
and a sidewall therebetween, said second end integrally connected to said second surface of said base, said body extending
away from said second planar surface of said base into a space exterior to said base, said body having an aperture defined
in said first end, said aperture extending from said first end to said second end, said aperture defining a volume in said
hollow body, said hollow body configured to retain a gas in said volume when said resonator is disposed in said liquid while
said aperture is aligned with a direction of gravitational pull.