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Physics-constrained inverse acoustic reconstruction via POCS-inspired relaxed projection–prox iterations
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DOI：10.1016/j.advengsoft.2026.104197.png)
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Abstract
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• Training-free acoustic gap completion via relaxed projection–prox iterations. • Active frequency bins are estimated directly from partial measurements. • Soft spectral shrinkage preserves oscillatory Helmholtz structure in gaps. • Outperforms tested geometric, HELS, and ESM baselines on shadow gaps. • Known obstacles are handled by geometry-aware scattered-field refinement.
Keywords:
acoustic gap completion
relaxed projection–prox iterations
spectral shrinkage
inverse acoustic reconstruction
geometry-aware refinement
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