Effects of the Simultaneous Application of Nonlinear Frequency Compression and Dichotic Hearing on the Speech Recognition of Severely Hearing-Impaired Subjects: Simulation Test

Title
Effects of the Simultaneous Application of Nonlinear Frequency Compression and Dichotic Hearing on the Speech Recognition of Severely Hearing-Impaired Subjects: Simulation Test
Authors
장동표
Keywords
Hearing Loss; Dichotic Listening Tests; Signal Processing; Computer-Assisted
Issue Date
2015-04
Publisher
KOREAN SOC OTORHINOLARYNGOL
Citation
CLINICAL AND EXPERIMENTAL OTORHINOLARYNGOLOGY, v. 8, NO 2, Page. 102-110
Abstract
Objectives. The clinical effects of the simultaneous application of nonlinear frequency compression and dichotic hearing on people with hearing impairments have not been evaluated previously. In this study, the clinical effects of the simultaneous application of these two techniques on the recognition of consonant-vowel-consonant (CVC) words with fricatives were evaluated using normal-hearing subjects and a hearing loss simulator operated in the severe hearing loss setting. Methods. A total of 21 normal-hearing volunteers whose native language was English were recruited for this study, and two different hearing loss simulators, which were configured for severe hearing loss in the high-frequency range, were utilized. The subjects heard 82 English CVC words, and the word recognition score and response time were measured. Results. The experimental results demonstrated that the simultaneous application of these two techniques showed almost even performance compared to the sole application of nonlinear frequency compression in a severe hearing loss setting. Conclusion. Though it is generally accepted that dichotic hearing can decrease the spectral masking thresholds of an hearing-impaired person, simultaneous application of the nonlinear frequency compression and dichotic hearing techniques did not significantly improve the recognition of words with fricatives compared to the sole application of nonlinear frequency compression in a severe hearing loss setting.
URI
http://e-ceo.org/journal/view.php?doi=10.3342/ceo.2015.8.2.102http://hdl.handle.net/20.500.11754/23977
ISSN
1976-8710; 2005-0720
DOI
http://dx.doi.org/10.3342/ceo.2015.8.2.102
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Graduate School of Biomedical Science & Engineering[S](의생명공학전문대학원) > ETC
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