Limitations of handsfree acoustic echo cancellers due to nonlinear loudspeaker distortion and enclosure vibration effects
Why this work is in the frame
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Bibliographic record
Abstract
The limitations of adaptive echo cancellers (AEC) for handsfree telephony include noise, finite precision and truncation effects, undermodelling of the acoustic impulse response, vibration of the plastic enclosure, loudspeaker nonlinearities, dynamic tracking and convergence and double-talk. This paper examines the effect that the loudspeaker nonlinearity and enclosure vibration have on the steady state ERLE performance and concludes that enclosure vibration is an important limitation which, although rarely mentioned in the literature, is probably the major limitation in terms of sound quality. Experimental measurements indicate that enclosure vibration at medium to high loudspeaker volumes limits the achievable ERLE and the perceived audio quality more than any other limitation mentioned above.
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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 | 0.000 | 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 it