Bibliographic record
Abstract
Acoustical material plays a number of roles that are important in acoustic engineering such as the control of room acoustics, industrial noise control and studio acoustics.Sound absorptive materials are generally used to counteract the undesirable effects of sound reflection by hard, rigid and interior surfaces and thus help to reduce the reverberant noise levels.Cementitious materials may be used as interior finishing for interior surfaces in buildings.This paper review of sound absorption studies for cementitious materials for their potential benefits in sound absorption and investigate some finishing cementitious materials added with porous and fibrous materials to improve the sound absorption performance.Sprayed cement mortar containing cotton fibers and perlite of an amount of perlite in the region of 80% in relation to the cotton fibers gave the best results.Also sprayed fibrous cement mortar based on mixture of mineral wool and cement binders achieved high sound absorption. r é s u m éMatériau acoustique joue un certain nombre de rôles qui sont importants dans l'ingénierie acoustique tels que le contrôle de l'acoustique des salles, contrôle du bruit industriel et acoustique de studio.Absorbants phoniques sont généralement utilisés pour contrer les effets indésirables de la réflexion du son par les surfaces dures, rigides et de l'intérieur et ainsi contribuer à réduire les niveaux de bruit de réverbération.matériaux à base de ciment peut être utilisé comme finition intérieure pour les surfaces intérieures des bâtiments.Cette revue papier des études d'absorption acoustique de matériaux cimentiers pour leurs avantages potentiels de l'absorption acoustique et d'enquêter sur certains matériaux de finition à base de ciment a ajouté avec des matériaux poreux et fibreux pour améliorer les performances d'absorption acoustique.mortier de ciment projeté contenant des fibres de coton et de perlite d'un montant de perlite dans la région de 80% par rapport aux fibres de coton a donné les meilleurs résultats.Également pulvérisé mortier de ciment fibreux à base de mélange de laine minérale et de liants de ciment atteint haute absorption acoustique.
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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 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 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) | 0.002 | 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".