Tri-Cell-p satellite honeycomb acoustic metamaterial for enhanced low-frequency sound absorption
Bibliographic record
Abstract
Low-frequency noise control is challenging, as traditional absorbers need large cavity depths. This study introduces a Tri-Cell-p Satellite Honeycomb Acoustic Metamaterial with P-shaped cavities and micro-perforations near cavity walls. Its acoustic performance was evaluated using transfer matrix modeling, COMSOL finite element simulations, and impedance tube tests. The Cell-p metamaterial, with a 20 mm cavity depth, achieved a peak absorption of 0.94 at 700 Hz, a 340 Hz (49%) lower resonance than a conventional honeycomb’s 0.78 peak at 1040 Hz. Parametric analysis showed micro-perforation positioning tuned resonance from 700–1040 Hz while maintaining absorption above 0.83. Narrow cavity regions near perforations, under 5% of total volume, contributed ∼40% of energy dissipation due to thermoviscous effects. The full Tri-Cell-p configuration displayed dual resonances at 880 Hz and 1040 Hz, broadening effective absorption (α > 0.5) to 720–1150 Hz and boosting the 500–1000 Hz average absorption by 44.2%. These results guide the design of compact, high-efficiency acoustic metamaterials for low-frequency applications.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".