Programmable dissipation provides a practical route to steer nonunitary dynamics in periodically driven systems. Here we realize Floquet engineering of state-selective loss modulation in a reconfigurable electroacoustic two-level platform and demonstrate in situ control of the driven dynamics. We show that periodic dissipation links the spectrum of the Floquet operator over a single period to the decay behavior over many periods and enables switching of the dominant Floquet decay mode in real time. We find that the same loss window also admits a formally equivalent generalized measurement description in which the controlled selectivity induced by loss defines a tunable effective measurement strength and thus offers a route to Zeno freezing. We then implement a differential readout of the Aharonov-Anandan geometric phase by using a Zeno-frozen reference arm. Our results establish programmable dissipation as a unified tool for selective control over Floquet decay modes, for connecting loss modulation to measurement-like filtering and stabilization, and for enabling geometric phase readout in reconfigurable non-Hermitian platforms.

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• Geometric & topological phases
• Quantum Zeno dynamics
• Floquet systems
• Non-Hermitian systems