Audio Quality Perception of Hearing-Impaired Listeners in Complex Acoustic Environments.
Thomas Biberger, Stephan D Ewert
PMID 41129710WHAT IT FOUND
Listeners with moderate hearing loss struggled to detect audio distortions only when background maskers were present, not in quiet rooms.
Very mild hearing loss listeners rated distorted audio as higher quality when maskers were present, while moderate loss listeners rated it lower.
Key findings
01In rooms with maskers, listeners with moderate hearing loss had consistently higher distortion detection thresholds than those with very mild hearing loss, whereas no such difference was observed in rooms without maskers.
02The presence of maskers had opposite effects on quality ratings: listeners with very mild hearing loss rated distorted signals higher (better quality) with maskers, while listeners with moderate hearing loss consistently assigned lower quality scores.
03Sensitivity to nonlinear saturation distortions decreased significantly with increasing hearing loss across all room conditions, unlike sensitivity to spectral ripples or intensity changes which remained similar between groups.
STILL TO COME
How it was doneWhat they foundWhat it means for SLPs
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What it does not show
The study used headphone auralization to simulate rooms and maskers, which may not fully replicate the spatial cues and head-related transfer functions of real-world listening environments. Hearing loss was compensated with NAL-R, a linear strategy, which the authors note may not generalize to everyday experiences of hearing aid users who typically use nonlinear compression strategies. The sample size was small (12 per group), limiting the generalizability of the findings to the broader population of older adults with hearing loss. The study compared results to young normal-hearing listeners from a previous study rather than recruiting a matched control group, introducing potential confounds related to age and testing conditions.
Declared interests
The authors declared no potential conflicts of interest. The work was supported by the Deutsche Forschungsgemeinschaft (grant number 352015383 – SFB1330 A2).
The easy way to misread this
Do not assume that background noise improves audio quality perception for all hearing-impaired patients. While listeners with very mild loss rated distorted audio higher in noise, those with moderate loss rated it significantly lower, indicating that the effect of maskers depends heavily on the severity of hearing loss.