Bibliographic record
Abstract
Clarifying duct noise is gathering attention for various industries. Duct noise is one of the noise problems in the equipment such as air conditioner and ventilation system. In the duct noise, the noise generated by the sources due to the fan or motor are included, and these noise propagate in the L-shape duct with flow. However the propagation mechanism of these noise are not clarified, especially in the case of the propagation in the duct with flow. In this paper, we investigated the propagation and attenuation of the noise generated by the speaker in the duct with or without a flow both experimentally and numerically. The results show that in the case of the duct with the flow, the noise generated by the speaker at frequency more than 1200 Hz are damped more than in the case of the duct without the flow.In the numerical simulations, the results shows that the strength of the noise sources on the duct wall decreases in the case of the duct with a flow more than in the case of the duct without a flow. In the numerical simulations, we applied the coupling method using CFD and acoustic BEM solvers.
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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".