Pupil size during conversation tracks hearing loss and background noise. People with hearing loss show greater pupil drift over a conversation and different pupil responses around turn-taking, meaning quiet conversation is already effortful for them beyond what a hearing test captures.
Mean pupil size was significantly larger in N70 than in quiet (+0.089 mm) and in N70 than in N60 (+0.056 mm), with no significant difference between quiet and N60.
Talkers with hearing loss showed a significantly larger decrease in pupil size from baseline over a conversation (0.23 mm) compared to those with typical hearing (0.05 mm), consistent with greater fatigue.
Pupil responses around self-start, partner-start, and partner-stop were significantly different between talkers with and without hearing loss, while the self-stop response did not differ.
Single-blind randomized controlled trial. Sixty-four participants were randomized across two intervention arms and assessed at twelve weeks for the primary outcome…
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