Ward R Drennan1, Jong Ho Won, Alden O Timme, Jay T Rubinstein. 1. 1V.M. Bloedel Hearing Research Center, Department of Otolaryngology, University of Washington, Seattle, Washington, USA; and 2Department of Statistics, University of Washington, Seattle, Washington, USA.
Abstract
OBJECTIVES: Postlingually deaf cochlear implant users' speech perception improves over several months after implantation due to a learning process which involves integration of the new acoustic information presented by the device. Basic tests of hearing acuity might evaluate sensitivity to the new acoustic information and be less sensitive to learning effects. It was hypothesized that, unlike speech perception, basic spectral and temporal discrimination abilities will not change over the first year of implant use. If there were limited change over time and the test scores were correlated with clinical outcome, the tests might be useful for acute diagnostic assessments of hearing ability and also useful for testing speakers of any language, many of which do not have validated speech tests. DESIGN: Ten newly implanted cochlear implant users were tested for speech understanding in quiet and in noise at 1 and 12 months postactivation. Spectral-ripple discrimination, temporal-modulation detection, and Schroeder-phase discrimination abilities were evaluated at 1, 3, 6, 9, and 12 months postactivation. RESULTS: Speech understanding in quiet improved between 1 and 12 months postactivation (mean 8% improvement). Speech in noise performance showed no statistically significant improvement. Mean spectral-ripple discrimination thresholds and temporal-modulation detection thresholds for modulation frequencies of 100 Hz and above also showed no significant improvement. Spectral-ripple discrimination thresholds were significantly correlated with speech understanding. Low FM detection and Schroeder-phase discrimination abilities improved over the period. Individual learning trends varied, but the majority of listeners followed the same stable pattern as group data. CONCLUSIONS: Spectral-ripple discrimination ability and temporal-modulation detection at 100-Hz modulation and above might serve as a useful diagnostic tool for early acute assessment of cochlear implant outcome for listeners speaking any native language.
OBJECTIVES: Postlingually deaf cochlear implant users' speech perception improves over several months after implantation due to a learning process which involves integration of the new acoustic information presented by the device. Basic tests of hearing acuity might evaluate sensitivity to the new acoustic information and be less sensitive to learning effects. It was hypothesized that, unlike speech perception, basic spectral and temporal discrimination abilities will not change over the first year of implant use. If there were limited change over time and the test scores were correlated with clinical outcome, the tests might be useful for acute diagnostic assessments of hearing ability and also useful for testing speakers of any language, many of which do not have validated speech tests. DESIGN: Ten newly implanted cochlear implant users were tested for speech understanding in quiet and in noise at 1 and 12 months postactivation. Spectral-ripple discrimination, temporal-modulation detection, and Schroeder-phase discrimination abilities were evaluated at 1, 3, 6, 9, and 12 months postactivation. RESULTS: Speech understanding in quiet improved between 1 and 12 months postactivation (mean 8% improvement). Speech in noise performance showed no statistically significant improvement. Mean spectral-ripple discrimination thresholds and temporal-modulation detection thresholds for modulation frequencies of 100 Hz and above also showed no significant improvement. Spectral-ripple discrimination thresholds were significantly correlated with speech understanding. Low FM detection and Schroeder-phase discrimination abilities improved over the period. Individual learning trends varied, but the majority of listeners followed the same stable pattern as group data. CONCLUSIONS: Spectral-ripple discrimination ability and temporal-modulation detection at 100-Hz modulation and above might serve as a useful diagnostic tool for early acute assessment of cochlear implant outcome for listeners speaking any native language.
Authors: Seung-Ha Oh; Chong-Sun Kim; Eun Joo Kang; Dong Soo Lee; Hyo Jeong Lee; Sun O Chang; Soon-Hyun Ahn; Chan Ho Hwang; Hong Ju Park; Ja Won Koo Journal: Acta Otolaryngol Date: 2003-01 Impact factor: 1.494
Authors: David L Horn; Daniel J Dudley; Kavita Dedhia; Kaibao Nie; Ward R Drennan; Jong Ho Won; Jay T Rubinstein; Lynne A Werner Journal: J Acoust Soc Am Date: 2017-01 Impact factor: 1.840
Authors: Fawen Zhang; Gabrielle Underwood; Kelli McGuire; Chun Liang; David R Moore; Qian-Jie Fu Journal: Hear Res Date: 2019-04-17 Impact factor: 3.208