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Article
Evaluation of wideband frequency responses and non-linear frequency compression for children with mild to moderate high-frequency hearing loss
International Journal of Audiology
  • Jace Wolfe
  • Andrew John, University of Oklahoma Health Sciences Center
  • Erin Schafer, University of North Texas
  • Mary Hudson, University of Oklahoma Health Sciences Center
  • Michael Boretzki, Phonak AG
  • Susan Scollie, The University of Western Ontario
  • Whitney Woods, University of Oklahoma Health Sciences Center
  • Julie Wheeler, University of Oklahoma Health Sciences Center
  • Krystal Hudgens
  • Sara Neumann
Document Type
Article
Publication Date
3-1-2015
URL with Digital Object Identifier
10.3109/14992027.2014.943845
Abstract

Objective: To evaluate wideband amplification and non-linear frequency compression (NLFC) as a means to improve speech recognition for children with mild/moderate hearing loss. Design: Randomized within-subject design with repeated measures across test conditions. Study sample: Eleven children with mild to moderate hearing loss were evaluated with: (1) Phonak BTE without NLFC, (2) Phonak BTE with NLFC, and (3) Oticon BTE with wideband response extending to 8000 Hz. Results: Use of NLFC provided better detection and recognition of high-frequency stimuli (e.g. /sh/ and /s/). No difference in performance between conditions was observed for speech recognition when measured with the University of Western Ontario (UWO) plurals test and the UWO distinctive features difference test. Finally, there were no differences between conditions on the BKB-SIN test. Conclusions: Children with mild to moderate hearing loss have good access to high-frequency phonemes presented at fixed levels (e.g. 50 to 60 dBA) with both wideband and NLFC technology. Similarly, sentence recognition in noise was similar with wideband and NLFC. Adaptive test procedures that probe performance at lower input levels showed small but significant improvements in the detection and recognition of the phonemes /s/ and /sh/ with NLFC condition when compared to the NLFC Off and wideband conditions.

Citation Information
Jace Wolfe, Andrew John, Erin Schafer, Mary Hudson, et al.. "Evaluation of wideband frequency responses and non-linear frequency compression for children with mild to moderate high-frequency hearing loss" International Journal of Audiology Vol. 54 Iss. 3 (2015) p. 170 - 181
Available at: http://works.bepress.com/susan-scollie/28/