Acoustical decoupling of a dome: The adaptive reuse of historic Angelus Temple
Bibliographic record
Abstract
With its 128-foot-wide, unsupported concrete dome springing 125 feet above the floor of its quarter-circle plan, the original 5300-seat mother church of the International Church of the Foursquare Gospel in Los Angeles (circa 1923) required adaptive reuse as a rock-n-praise Christian church. Challenges included squelching its 7-s RT60, decoupling the dome by eliminating its unusually severe focusing (largely responsible for repetitive echoes), especially strong at the intended audio mix position and stage, integrating acoustical and audio systems design to achieve 118 dBA uniformly throughout, while meeting full operation for opening services within 7 months. Because of its structurally weak dome and its National Register status, the principal acoustical solution prohibited covering, or supporting anything from, the focusing dome. Described is a method not known to have been applied elsewhere intervening about 95% of all the problematic, focusing sound rays with large suspended baffle/absorber panels specifically designed and positioned via laser model studies while achieving an attractive, dramatic array. The result is remarkably successful with respect to all intended acoustical, audio, and historical architecture goals.
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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 | 0.001 | 0.000 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.002 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.004 | 0.001 |
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".