A Comparative Study Between Different Helmholtz Resonator Systems
Bibliographic record
Abstract
This paper proposes a best fit cylindrical Helmholtz resonator system attached to a duct for attenuating low frequency noise within 300 Hz using finite element method. Initially, an optimized system of two identical 2-DOF resonators in terms of relative position and orientation by adapting a published single 2-DOF resonator system. The optimum relative position of the two resonators is studied by placing them at less than antinode, antinode and node of the wavelength of sound source and the optimum relative orientation between the resonators is also found out at that optimum relative spacing. Finally, the optimized system of two identical 2-DOF resonators is compared with three published studies of single 2-DOF, single 1-DOF and two identical 1-DOF resonator systems and the results indicates that two identical 2-DOF resonator system provide a comparatively wider bandwidth of noise attenuation within 300 Hz. The obtained analytical and numerical results of transmission loss for the adapted single 2-DOF have been validated with that of the published experimental result and a good agreement is found.
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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".