Modeling the Relationship Between Listener Factors and Envelope Fidelity: A Pooled Analysis Spanning a Decade.

The analysis pooled data from only four studies with 80 participants, which limits the generalizability of the findings. The Reading Span Test used to measure working memory is not validated for clinical use, so these results may not directly translate to standard clinical assessments. The envelope fidelity metric was validated primarily in laboratory conditions and may not fully capture real-world listening experiences. Two of the original six studies in the series were excluded due to methodological differences, which may have introduced bias or lost relevant data.

Do not assume that patients with higher working memory do not need clean speech signals. The finding that they did not show additional improvement with higher envelope fidelity likely reflects a ceiling effect where their performance was already high, not that they are immune to distortion. Furthermore, do not apply these findings to patients with normal hearing or profound hearing loss, as the study population was limited to older adults with mild to moderately severe loss.