Does experience with hearing aid amplification influence electrophysiological measures of speech comprehension?

Pushkar Deshpande, Christian Brandt (Medlem af forfattergruppering), Stefan Debener (Medlem af forfattergruppering), Tobias Neher* (Medlem af forfattergruppering)


Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review


OBJECTIVE: To explore if experience with hearing aid (HA) amplification affects speech-evoked cortical potentials reflecting comprehension abilities.

DESIGN: N400 and late positive complex (LPC) responses as well as behavioural response times to congruent and incongruent digit triplets were measured. The digits were presented against stationary speech-shaped noise 10 dB above individually measured speech recognition thresholds. Stimulus presentation was either acoustic (digits 1-3) or first visual (digits 1-2) and then acoustic (digit 3).

STUDY SAMPLE: Three groups of older participants (N  = 3 × 15) with (1) pure-tone average hearing thresholds <25 dB HL from 500-4000 Hz, (2) mild-to-moderate sensorineural hearing loss (SNHL) but no prior HA experience, and (3) mild-to-moderate SNHL and >2 years of HA experience. Groups 2-3 were fitted with test devices in accordance with clinical gain targets.

RESULTS: No group differences were found in the electrophysiological data. N400 amplitudes were larger and LPC latencies shorter with acoustic presentation. For group 1, behavioural response times were shorter with visual-then-acoustic presentation.

CONCLUSION: When speech audibility is ensured, comprehension-related electrophysiological responses appear intact in individuals with mild-to-moderate SNHL, regardless of prior experience with amplified sound. Further research into the effects of audibility versus acclimatisation-related neurophysiological changes is warranted.

TidsskriftInternational Journal of Audiology
Sider (fra-til)1-10
Antal sider10
StatusE-pub ahead of print - 27. nov. 2023


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