Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users
A previous study demonstrated that consonant recognition improved significantly in normal hearing listeners when useful frequency and time ranges were intensified by 6 dB. The goal of this study was to determine whether bilateral cochlear implant (BCI) and bilateral hearing aid (BHA) users experienc...
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| Format: | Article |
| Language: | English |
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Frontiers Media S.A.
2022-08-01
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| Series: | Frontiers in Psychology |
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| Online Access: | https://www.frontiersin.org/articles/10.3389/fpsyg.2022.918914/full |
| _version_ | 1828151569069113344 |
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| author | Yang-Soo Yoon Carrie Drew |
| author_facet | Yang-Soo Yoon Carrie Drew |
| author_sort | Yang-Soo Yoon |
| collection | DOAJ |
| description | A previous study demonstrated that consonant recognition improved significantly in normal hearing listeners when useful frequency and time ranges were intensified by 6 dB. The goal of this study was to determine whether bilateral cochlear implant (BCI) and bilateral hearing aid (BHA) users experienced similar enhancement on consonant recognition with these intensified spectral and temporal cues in noise. In total, 10 BCI and 10 BHA users participated in a recognition test using 14 consonants. For each consonant, we used the frequency and time ranges that are critical for its recognition (called “target frequency and time range”), identified from normal hearing listeners. Then, a signal processing tool called the articulation-index gram (AI-Gram) was utilized to add a 6 dB gain to target frequency and time ranges. Consonant recognition was monaurally and binaurally measured under two signal processing conditions, unprocessed and intensified target frequency and time ranges at +5 and +10 dB signal-to-noise ratio and in quiet conditions. We focused on three comparisons between the BCI and BHA groups: (1) AI-Gram benefits (i.e., before and after intensifying target ranges by 6 dB), (2) enhancement in binaural benefits (better performance with bilateral devices compared to the better ear alone) via the AI-Gram processing, and (3) reduction in binaural interferences (poorer performance with bilateral devices compared to the better ear alone) via the AI-Gram processing. The results showed that the mean AI-Gram benefit was significantly improved for the BCI (max 5.9%) and BHA (max 5.2%) groups. However, the mean binaural benefit was not improved after AI-Gram processing. Individual data showed wide ranges of the AI-Gram benefit (max −1 to 23%) and binaural benefit (max −7.6 to 13%) for both groups. Individual data also showed a decrease in binaural interference in both groups after AI-Gram processing. These results suggest that the frequency and time ranges, intensified by the AI-Gram processing, contribute to consonant enhancement for monaural and binaural listening and both BCI and BHA technologies. The intensified frequency and time ranges helped to reduce binaural interference but contributed less to the synergistic binaural benefit in consonant recognition for both groups. |
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| format | Article |
| id | doaj.art-95b206a5352243db840da38f1c5f576a |
| institution | Directory Open Access Journal |
| issn | 1664-1078 |
| language | English |
| last_indexed | 2024-04-11T21:59:41Z |
| publishDate | 2022-08-01 |
| publisher | Frontiers Media S.A. |
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| series | Frontiers in Psychology |
| spelling | doaj.art-95b206a5352243db840da38f1c5f576a2022-12-22T04:01:00ZengFrontiers Media S.A.Frontiers in Psychology1664-10782022-08-011310.3389/fpsyg.2022.918914918914Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid usersYang-Soo YoonCarrie DrewA previous study demonstrated that consonant recognition improved significantly in normal hearing listeners when useful frequency and time ranges were intensified by 6 dB. The goal of this study was to determine whether bilateral cochlear implant (BCI) and bilateral hearing aid (BHA) users experienced similar enhancement on consonant recognition with these intensified spectral and temporal cues in noise. In total, 10 BCI and 10 BHA users participated in a recognition test using 14 consonants. For each consonant, we used the frequency and time ranges that are critical for its recognition (called “target frequency and time range”), identified from normal hearing listeners. Then, a signal processing tool called the articulation-index gram (AI-Gram) was utilized to add a 6 dB gain to target frequency and time ranges. Consonant recognition was monaurally and binaurally measured under two signal processing conditions, unprocessed and intensified target frequency and time ranges at +5 and +10 dB signal-to-noise ratio and in quiet conditions. We focused on three comparisons between the BCI and BHA groups: (1) AI-Gram benefits (i.e., before and after intensifying target ranges by 6 dB), (2) enhancement in binaural benefits (better performance with bilateral devices compared to the better ear alone) via the AI-Gram processing, and (3) reduction in binaural interferences (poorer performance with bilateral devices compared to the better ear alone) via the AI-Gram processing. The results showed that the mean AI-Gram benefit was significantly improved for the BCI (max 5.9%) and BHA (max 5.2%) groups. However, the mean binaural benefit was not improved after AI-Gram processing. Individual data showed wide ranges of the AI-Gram benefit (max −1 to 23%) and binaural benefit (max −7.6 to 13%) for both groups. Individual data also showed a decrease in binaural interference in both groups after AI-Gram processing. These results suggest that the frequency and time ranges, intensified by the AI-Gram processing, contribute to consonant enhancement for monaural and binaural listening and both BCI and BHA technologies. The intensified frequency and time ranges helped to reduce binaural interference but contributed less to the synergistic binaural benefit in consonant recognition for both groups.https://www.frontiersin.org/articles/10.3389/fpsyg.2022.918914/fullconsonant recognitionspectral cuestemporal cuesarticulation-index grambinaural integration |
| spellingShingle | Yang-Soo Yoon Carrie Drew Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users Frontiers in Psychology consonant recognition spectral cues temporal cues articulation-index gram binaural integration |
| title | Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users |
| title_full | Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users |
| title_fullStr | Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users |
| title_full_unstemmed | Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users |
| title_short | Effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users |
| title_sort | effects of the intensified frequency and time ranges on consonant enhancement in bilateral cochlear implant and hearing aid users |
| topic | consonant recognition spectral cues temporal cues articulation-index gram binaural integration |
| url | https://www.frontiersin.org/articles/10.3389/fpsyg.2022.918914/full |
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