Abstract:
BACKGROUND:Evidence suggests that hearing-aid users have difficulties with own-voice level control, most likely because their auditory feedback is affected by hearing-aid amplification. PURPOSE:The purpose of this study was to investigate how changes to auditory feedback affect the voice level of hearing-aid users. RESEARCH DESIGN:A correlational study was set up to investigate the relation between voice level and hearing-aid amplification. STUDY SAMPLE:Seven hearing-impaired speakers participated. All were experienced hearing-aid users. DATA COLLECTION AND ANALYSIS:The speakers projected their voice to a passive listener across different speaker-listener distances and with different prescriptions of gain in an experimental hearing aid. For each combination of conditions, produced voice level and self-perceived voice level was measured. These data were subjected to an analysis of variance assuming a mixture of random and fixed effects. In addition, all speakers took part in interviews. RESULTS:Three speakers reacted to the changes in auditory feedback in agreement with previous experiments with normal-hearing speakers: they compensated by changing produced voice level. In contrast, the voice levels in the other four speakers were largely unaffected by the changes to auditory feedback. A secondary observation was that while all speakers increased their voice level with distance, the two subgroups produced different growth rates of vocal level versus distance. CONCLUSIONS:It is hypothesized that the speakers in the former subgroup relied on auditory feedback for solving the experimental task, whereas the latter subgroup had developed an own-voice level-control strategy based on proprioceptory feedback, possibly because they have lost faith in their auditory feedback mechanism, which indeed is changed by both hearing loss and hearing-aid amplification. Comparison to "target" voice levels suggests that proprioceptory feedback is less effective than auditory feedback for achieving adequate level-distance growth rate.
journal_name
J Am Acad Audioljournal_title
Journal of the American Academy of Audiologyauthors
Laugesen S,Nielsen C,Maas P,Jensen NSdoi
10.3766/jaaa.20.8.5subject
Has Abstractpub_date
2009-09-01 00:00:00pages
503-13issue
8eissn
1050-0545issn
2157-3107journal_volume
20pub_type
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