Effect of the New Insulation Liner on Noise Levels in the CH124B (Sea King) Aircraft
Bibliographic record
Abstract
Abstract : Crew members of the CH124B (Sea King) helicopter are exposed to elevated noise levels. To minimize noise levels as well as to insulate electrical wiring, the Sea King is equipped with a liner, which reduces noise. Recently the Sea King helicopters have been equipped with a new type of liner. Defence Research and Development Canada (DRDC) Toronto was asked to verify the noise levels in the Sea King during flight with the new liner and compare it with the old liner. Equivalent noise levels and octave band analysis were performed on a Sea King helicopter from Shearwater in February 5 and 6, 2008. Results showed that the new liner has absorption capabilities similar to or better than the old liner, except at the very low frequency of 8 Hz where absorption capability was lower for the new liner. Although at-ear sound pressure levels were not measured, it is reasonable to assume that they are acceptable with the new liner since they were acceptable with the old liner. Since sound pressure levels are significantly higher when the cargo door is open, it was recommended to open the door only for a short period of time to avoid excessive exposure for the crewmen and troops.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.001 |
| 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 | 0.001 | 0.000 |
| Insufficient payload (model declined to judge) | 0.002 | 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 source (direct Gemma or distilled Codex), 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".