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Life sciences · Preprint
arXiv · August 17, 2026
Raises a question worth testing. It does not answer one.
This is a preprint describing a machine-learning method that combines low-cost analytical models with scarce high-fidelity simulations to predict acoustic resonance frequencies in rectangular side-branch Helmholtz resonators. The framework is evaluated only on synthetic simulation data and has not been peer reviewed. It is a computational methods contribution, not a clinical or empirical study, and addresses only the technical question of data-efficient surrogate learning in acoustics.
Computational methods comparison study. Rectangular side-branch Helmholtz resonators; 86 geometries labelled with high-fidelity finite-element simulation and 8,998 evaluated analytically.. Intervention: Analytical-prior learning framework combining low-cost analytical model with scarce high-fidelity simulation data via support vector regression and multilayer perceptron with pretraining.. Compared with: Direct support vector regression and direct multilayer perceptron without analytical prior; standalone analytical model..
Analytical model alone achieved mean absolute error (MAE) of 1.333 Hz on resonance frequency prediction Residual support vector regression reduced MAE to 0.426 Hz using 86 simulation-labelled geometries Analytical-prior multilayer perceptron with full fine-tuning achieved MAE of 0.371 Hz
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A methodological proof-of-concept study demonstrating a machine-learning framework on a single acoustic engineering problem with no clinical or patient-relevant outcomes.
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High-fidelity finite-element simulations can provide accurate numerical predictions for side-branch resonators, but large simulation datasets are expensive to generate and purely data-driven surrogates may become unreliable when simulation-labelled data are scarce. This study develops an analytical-prior learning framework that reuses a low-cost analytical model to improve data efficiency under limited high-fidelity simulation budgets. Two complementary routes are considered. When the analytical model remains available at inference, it is retained as an explicit baseline and the simulation data are used to learn only the analytical-to-simulation discrepancy. When a self-contained predictor is required, the analytical mapping is first distilled from abundant low-cost evaluations into a learned prior and then calibrated with the limited simulation data. The framework is evaluated on rectangular side-branch Helmholtz resonators using 86 simulation-labelled geometries and 8,998 non-overlapping analytical-only geometries. The analytical model achieved a mean absolute error (MAE) of 1.333 Hz. Direct support vector regression (SVR) achieved 3.375 Hz, while residual SVR reduced the MAE to 0.426 Hz. A direct multilayer perceptron (MLP) achieved 1.109 Hz, whereas analytical-prior pretraining reduced the error to 0.556 Hz with frozen-prior residual adaptation and 0.371 Hz with full-model fine-tuning. Across training budgets of 20 to 70 simulation-labelled cases, both analytical correction and analytical-prior pretraining consistently improved data efficiency relative to direct learning. These results show that analytical prior information can substantially improve high-fidelity prediction when simulation data are scarce, with explicit correction and prior distillation serving complementary deployment needs.
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