A high frequency gravitational wave generator including a gas filled shell with an outer shell surface, microwave emitters, sound generators, and acoustic vibration resonant gas-filled cavities. The outer shell surface is electrically charged and vibrated by the microwave emitters to generate a first electromagnetic field. The acoustic vibration resonant gas-filled cavities each have a cavity surface that can be electrically charged and vibrated by acoustic energy from the sound generators such that a second electromagnetic field is generated. The two acoustic vibration resonant gas-filled cavities are able to counter spin relative to each other to provide stability, and propagating gravitational field fluctuations are generated when the second electromagnetic field propagates through the first electromagnetic field. 1. A high frequency gravitational wave generator comprising: a gas-filled shell, the gas-filled shell comprising of microwave emitters, the gas filled shell has an outer shell surface and an inner shell surface, the outer shell surface is able to be electrically charged by an electrical source and is able to be vibrated by the microwave emitters, such that it generates a first electromagnetic field; at least two sound generators for generating sound, the at least two sound generators disposed within the gas-filled shell; two acoustic vibration resonant gas-filled cavities for propagation of sound created by the at least two sound generators, the two acoustic vibration resonant gas-filled cavities are disposed within the gas-filled shell and each resonant gas-filled cavity has one cavity surface that can be electrically charged, the acoustic energy from the at least two sound generators causing each of the electrically charged cavity surfaces to vibrate such that a second electromagnetic field is generated; the two acoustic vibration resonant gas-filled cavities being able to counter spin relative to each other to provide stability, propagating gravitational field fluctuations are generated when the second electromagnetic field propagates through the first electromagnetic field. 2. The high frequency gravitational wave generator of claim 1, wherein the high frequency gravitational wave generator includes wiring to electrically charge the outer shell surface and the cavity surfaces, to power the microwave emitters and the sound generators, the wiring being room temperature superconducting wiring. 3. The high frequency gravitational wave generator of claim 1, wherein the gas-filled shell and the two acoustic vibration resonant gas-filled cavities are filled with an inert gas. 4. The high frequency gravitational wave generator of claim 3, wherein the gas-filled shell is filled with Xenon. 5. The high frequency gravitational wave generator of claim 1, wherein the acoustic resonant gas-filled cavities have the geometrical configuration of incongruent wedges. STATEMENT OF GOVERNMENT INTEREST: The invention described herein may be manufactured and used by or for the Government of the United States of America for governmental purposes without payment of any royalties thereon or therefor. BACKGROUND: Gravitational waves can be seen as undulations in the structure of spacetime, or ripples in the curvature of the spacetime fabric arising from the dynamics of massive physical entities or high frequency/high energy far-from-equilibrium dynamics. Electromagnetic (EM) radiation passed through a static magnetic field gives rise to gravitational waves at the same frequency via the Gertsenshtein Effect, which can be utilized for advanced propulsion, through-solid communication, and planetoid disruption. Artificial high energy EM fields interact strongly with the local Vacuum energy state, modifying the local spacetime energy density. SUMMARY & DETAILED DESCRIPTION: The high frequency gravitational wave generator includes a gas-filled shell with an outer shell surface, microwave emitters, sound generators, and two acoustic vibration resonant gas-filled cavities. The outer shell is electrically charged by an electrical source and vibrated by microwave emitters to generate a first EM field. Disposed within the shell are counter-spinning resonant cavities filled with an inert gas (such as Helium, Neon, Argon, or Xenon) that is converted to plasma by acoustic or microwave energy. The sound generators vibrate the charged cavity surfaces to produce a second EM field. When the second EM field propagates through the first EM field, propagating gravitational field fluctuations are generated. The device may utilize room-temperature superconducting wiring pulsed with EM radiation from sources such as optically pumped photo-diodes, microwave emitters, or Klystron tubes.