Gravity as Acoustic Radiation Pressure

This paper derives Newtonian gravity as an emergent phenomenon arising from acoustic radiation pressure between oscillating structures in a superfluid vacuum. Building on the analogue gravity programme of Unruh, Visser, and Barceló, and the superfluid vacuum theory of Volovik, it proposes that matter consists of self-sustaining oscillations (oscillons) in a medium belonging to the ³He-A universality class, and that gravitational attraction arises as the Secondary Bjerknes Force between in-phase oscillators. The framework reproduces the Newtonian inverse-square law as a geometric consequence of spherical wave propagation, renders the equivalence of inertial and gravitational mass tautological, and resolves the vacuum catastrophe through the Gibbs–Duhem relation for a self-sustained condensate. The tensor polarisation of gravitational waves observed by LIGO is addressed through the emergent metric formalism, with the identification of the specific propagating spin-2 collective mode noted as an open theoretical problem. Five falsifiable predictions are presented that distinguish this framework from standard General Relativity, including gravitational wave echoes at superfluid phase boundaries, mass modulation from driven oscillation, vacuum electrostatic potential shifts, gravitational wave polarisation anomalies, and high-frequency dispersion. Open problems are discussed, including the phase-locking mechanism and the spin-2 mode identification. A companion paper, "Gravity as Pressure Gradient: A Superfluid Vacuum Mechanics," extends this work with a quantitative derivation of gravitational radiation power matching the Hulse–Taylor binary pulsar measurement.