Comparittve study of noise and vibration measurements of computer cooling fans
Bibliographic record
Abstract
Due to consumer demands in the computer industry, video processor chips have become more powerful with a resulting requirement to dissipate ever increasing amounts o f heat.As such, the performance requirements o f cooling fans have been increasingly taxed to deliver higher flow rates.To accomplish this, large fans o f various designs are used at relatively high rotational speeds.This, however, often results in structural resonance due to dynamic imbalances o f the fan rotor.With larger fans are larger fan housings which often have higher acoustic radiation efficiencies resulting in a 'speaker effect' which can amplify the fan vibration into audible noise.This study investigates the relationship between measured vibration levels of several cooling fan heat sink designs to experimentally determine acoustic emission levels.Specifically, an attempt to correlate the realized acceleration levels to both sound power and sound pressure levels was sought.It was found that a correlation o f overall noise and vibration levels was possible.Further, an even more obvious comparison was realized with the examination o f one third octave frequency spectra o f the two metrics.A discussion o f vibration reduction measures is also included.
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How this classification was reachedexpand
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 | 0.000 | 0.000 |
| 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 | 0.000 | 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 itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, 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".