Abstract
Integration of speech information (or not) across electric and acoustic modes in hearing impaired listeners
The Journal of the Acoustical Society of America, Vol.144(3), pp.1800-1801
09/2018
DOI: 10.1121/1.5067945
Abstract
Many people with hearing loss use two cochlear implants (bilateral CIs), or combine a CI and hearing aid (bimodal). While the addition of a second CI or acoustic input improves speech perception (particularly in noise), it is not well understood how listeners fuse these disparate inputs. We addressed this with a duplex perception experiment. Listeners heard the four cardinal vowels from six talkers. In the duplex condition, the first formant was presented to the CI, and the second to the other CI or hearing aid (and vice versa). In normal listeners (N = 14), accuracy under duplex presentation (across ears; M= 0.80) did not differ from combined presentation (both formants, both ears, M = 0.76, p = 0.14), but performance dropped to near chance with isolated formants (M = 0.40, p<0.001). CI users (Bilateral: N = 7; bimodal: N = 11; single-side-of-deafness [SSD]: N = 7) performed well in combined presentation (Bilateral: M = 0.72, Bimodal: M = 0.70, SSD: M = 0.83), and poorly for isolated formants (Bilateral: M = 0.42, Bimodal: M = 0.39, SSD: M = 0.41). Duplex presentation was significantly poorer than combined (Bilateral: M = 0.54, p = 0.0078; Bimodal: M = 0.55, p<0.001; SSD: Duplex: 0.48, p<0.001), though better than isolated formants (p<0.05). Thus, CI users may not fuse inputs well at an auditory level, and the benefits of acoustic + electric hearing may derive from central integration.
Details
- Title: Subtitle
- Integration of speech information (or not) across electric and acoustic modes in hearing impaired listeners
- Creators
- Michael Seedorff - Biostatistics, Univ. of Iowa, Iowa City, IABob McMurray - Psych., Univ. of Iowa, E11 SSH, Iowa City, IA 52242, bob-mcmurray@uiowa.edu
- Resource Type
- Abstract
- Publication Details
- The Journal of the Acoustical Society of America, Vol.144(3), pp.1800-1801
- DOI
- 10.1121/1.5067945
- ISSN
- 0001-4966
- eISSN
- 1520-8524
- Number of pages
- 2
- Date published
- 09/2018
- Academic Unit
- Communication Sciences and Disorders; Psychological and Brain Sciences; Linguistics; Iowa Neuroscience Institute; Otolaryngology
- Record Identifier
- 9984071667402771
Metrics
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