Enhanced finite-element model and acoustic test fixture to assess the objective occlusion effect induced by earplugs under bone-conducted stimulation
Why this work is in the frame
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Bibliographic record
Abstract
The occlusion effect refers to the increased perception, mainly at low frequencies, of bone-conducted sounds like physiological noises and one's own voice when one wears hearing protection devices. This phenomenon may lead to an acoustic discomfort and subsequently to less effective protection. It can be quantified by an objective indicator defined as the difference between the sound pressure level in the open and occluded earcanal. Several finite-element models based on truncated outer ears are available in the literature for predicting the objective occlusion effect but they suffer from several limitations mainly due to anatomical simplifications. In this paper, the occlusion effect of earplugs is assessed using an enhanced finite-element model and an augmented acoustic test fixture both based on the same real head geometry of a living participant. The finite-element head model is evaluated by comparing numerical results with various experimental data. The augmented acoustic test fixture is evaluated itself with respect to the participant. Using the finite-element model, the variability of the occlusion effect induced by the uncertainty on the stimulation position of the bone transducer, the position in the earcanal where the occlusion effect is assessed, and the uncertainty on the soft tissue Poisson's ratio is investigated.
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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 | 0.001 | 0.002 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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 it