Please use this identifier to cite or link to this item:
https://observatorio.fm.usp.br/handle/OPI/44134
Title: | The influence of stimulation levels on auditory thresholds and speech recognition in adult cochlear implant users |
Authors: | MARTINS, Kelly Vasconcelos Chaves; GOFFI-GOMEZ, Maria Valeria Schmidt |
Citation: | COCHLEAR IMPLANTS INTERNATIONAL, v.22, n.1, p.42-48, 2021 |
Abstract: | Objective: This study aims to evaluate the influence of minimum and maximum stimulation levels on auditory thresholds and speech recognition abilities in adult cochlear implant users. Method: Fifteen adults implanted with a Cochlear (R) device with over 12 months listening experience. Participants underwent routine programming for optimization of minimum (T) and maximum comfort (C) stimulation levels, which was saved in Program 1 (MO). Three further maps were constructed artificially adjusting the measured levels: Program 2 - MO with 10 fewer electrical current units at C level (MC-); Program 3 - MO with 10 fewer electric current units at T level (MT-); and Program 4 - MO with 10 more electric current units at T level (MT+). Sound field thresholds, recorded sentence recognition and monosyllable tests were presented in quiet and in noise. Results: There were significantly better thresholds at 1, 3, 4, and 6 kHz frequencies in MT+ and worse in MC-. A statistically significant difference was observed for sentences in quiet and monosyllables in quiet and noise with changing C levels, with worsening of the results for MC- program. Conclusion: The results suggest that T levels above the behavioural threshold provided an improvement in sound field thresholds but did not influence performance on speech recognition tests in quiet and in noise. In contrast, C levels below the behavioural comfort level worsened sound field thresholds and led to poorer performance in tests of sentence recognition in quiet and monosyllable recognition in quiet and in noise. |
Appears in Collections: | Artigos e Materiais de Revistas Científicas - HC/ICHC Artigos e Materiais de Revistas Científicas - LIM/32 |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
art_MARTINS_The_influence_of_stimulation_levels_on_auditory_thresholds_2021.PDF Restricted Access | publishedVersion (English) | 1.04 MB | Adobe PDF | View/Open Request a copy |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.