This paper presents a two-dimensional acoustic black hole (ABH) plate engineered as an intelligent, wave-focusing core for harvesting energy from hydraulic pressure pulsations. Moving beyond the conventional force-transmission paradigm, the tailored geometry of the plate passively concentrates diffuse pressure pulsations into localized strain energy. A coupled fluid-structure-electrical model reveals a constructive synergy through which the system’s static pressure enhances the ABH’s wave-focusing efficiency. Experimental validation under realistic operating conditions (2 MPa static pressure, 135 Hz pulsation) demonstrates a 3.8-fold enhancement in open-circuit voltage compared to a uniform plate of identical dimensions and boundary conditions, achieving a peak average power of 3.6 mW and a record volumetric power density of 12.6 μW mm−3. This work demonstrates the ABH as a versatile, smart structural platform for energy-autonomous systems in high-pressure hydraulic environments.