Effects of structural flanking on apparent STC of steel stud wall
Bibliographic record
Abstract
The results of the sound transmission class (STC) 50 tests are described and the effects of flanking transmission on the test results are discussed. The issuance of an occupancy permit often depends on achieving STC of demising walls within both newly-constructed and converted condominium buildings. The demising wall which separated the bathroom and entry/kitchen area of the test suite from the corridor was constructed. The Apparent STC test was carried out in accordance with ASTM E 336-05 to the extent possible given the small size of both the source (corridor) and receiving (bathroom) spaces. A powerful loudspeaker fed with stead broad-band noise was placed in the corridor and average sound pressure levels were measured with a Larson-Davi Model LD2800 Real Time Analyzer. The initial test of the corridor wall yielded at Apparent STC (ASTC) of 46, whereas the 2006 BC Building Code rates this construction at STC 57 to 59.
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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 | 0.001 | 0.009 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 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".