Investigating the effect of speech stimuli on temporal masking release

Davies-Venn, Evelyn E.; Nie, Yingjiu; Švec, Adam; Katare, Bhagyashree

doi:10.1121/1.3655301

Cited by 3 publications

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“…Stimuli 218 spondee words spoken by a male talker were used in the experiments. The chance level for NH listeners to recognize the words was lower than 10% when these words were repeatedly presented (Davies-Venn et al, 2011). Two of the spondee words were randomly selected and spliced to form one presentation of four syllables (referred to as double-spondee).…”

Section: Participantsmentioning

confidence: 99%

The effects of temporal envelope confusion on listeners' phoneme and word recognition

Nie¹,

Švec²,

Munson

2013

Proceedings of Meetings on Acoustics

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Broadened auditory filters in listeners with hearing loss may result in listeners' increased reliance on temporal envelope cues for understanding speech. Previous data have shown that background noise may affect hearing-impaired (HI) listeners by negatively affecting the temporal envelope cues in speech. The current study investigates additional HI listeners? understanding of vocoded spondees in the presence of fluctuating and stationary background noise. Stimuli were 8-and 32-channel noise vocoded double spondees, high-pass filtered at 1426 Hz. New data confirmed the previous finding that temporal envelope confusion in HI listeners resulted in speech understanding that is poorer in fluctuating noise (at a rate of 4Hz) than in stationary noise. Preliminary analysis suggests HI listeners experience significant envelope confusion for both 8-and 32-channel vocoded stimuli. Additional analysis of phoneme errors suggests that envelope confusion affects HI listeners' perception of both consonants and vowels. Further analysis of j-factors will indicate the relationship of phoneme to whole word understanding for vocoded speech in noise. Results confirm the importance of temporal envelope cues for phoneme and syllable recognition for listeners with hearing loss. Work is supported by NIH DC008306 to PB Nelson Published by the Acoustical Society of America through the American Institute of Physics Nie et al.

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Section: Participantsmentioning

confidence: 99%

The effects of temporal envelope confusion on listeners' phoneme and word recognition

Nie¹,

Švec²,

Munson

2013

Proceedings of Meetings on Acoustics

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“…However, had slightly more difficult test materials been used, it's possible that spectral resolution would have played a bigger role in resolving the spectral information present within the valleys of the masker. For example, a "double-spondee" task has been proposed as an alternative way to measure speech perception in modulated noise (Davies-Venn et al, 2011), where test materials are concatenated spondees (e.g. baseball-cowboy) and participants would need to correctly identify both spondees.…”

Section: Hypothesis 3: Correlating Masking Release To Spectral Ripplementioning

confidence: 99%

Speech masking release in hybrid cochlear implant users

Tejani¹

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Improved cochlear implant (CI) designs and surgical techniques have allowed CI patients to retain acoustic hearing in the implanted ear post-operatively. These EAS (electric-acoustic stimulation) CI users listen with a combination of acoustic and electric hearing in the same ear. While electric hearing alone improves speech recognition in quiet, preserved acoustic hearing allows EAS CI users to outperform traditional CI users in speech recognition in noise and demonstrate "speech masking release," an improvement in speech recognition in temporally fluctuating noise relative to steady noise. Masking release is arguably an ecologically valid metric, as listeners often attend to target speech embedded in fluctuating competing speech. Improved speech recognition outcomes have been attributed to the spectral and temporal resolution provided by acoustic hearing. However, the relationship between spectral and temporal resolution and outcomes in EAS CI users is not clear. This study evaluated speech masking release, spectral ripple density discrimination thresholds, and fundamental frequency difference limens (f 0 DLs) in EAS CI users. Both the ripple and f 0 DL tasks are thought to measure underlying spectral resolution and temporal fine structure. EAS CI subjects underwent testing in three listening modes: acoustic-only, electric-only, and acoustic+electric. Comparisons across listening modes allowed the benefit provided by acoustic hearing to be quantified. It was hypothesized that speech masking release, spectral ripple density discrimination thresholds, and f 0 DLs would be poorest with electric-only hearing and would improve in the acousticonly and acoustic+electric listening modes. This would reflect the benefit of preserved acoustic hearing. It was also hypothesized that speech masking release would correlate with spectral ripple density discrimination thresholds and f 0 DLs, reflecting the roles of spectral and temporal fine structure cues. Lastly, it was hypothesized that EAS CI users with more residual hearing (lower audiometric thresholds) would perform better on all three tasks. v Speech masking release was evaluated using a 12-alternative-forced-choice (AFC) spondee recognition in noise task. The noise was a two-talker and a ten-talker babble presented at-5 dB SNR, and masking release was quantified as the difference in spondee recognition in two-talker babble relative to ten-talker babble. Spectral ripple density discrimination thresholds were assessed in a 3-AFC task using a broadband stimulus that contained spectral peaks and valleys logarithmically spaced on the frequency axis. The spacing between spectral peaks (ripple density) was varied to determine the threshold at which listeners could no longer resolve the individual spectral peaks. F 0 DLs were assessed via a 3-AFC task using a broadband harmonic complex with a baseline f 0 = 110 Hz. The f 0 of the test intervals was varied to determine the smallest change in f 0 that the listener could detect. Results showed that performance in all three measure...

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Speech masking release in Hybrid cochlear implant users: Roles of spectral and temporal cues in electric-acoustic hearing

Tejani

Brown

2020

The Journal of the Acoustical Society of America

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When compared with cochlear implant (CI) users utilizing electric-only (E-Only) stimulation, CI users utilizing electric-acoustic stimulation (EAS) in the implanted ear show improved speech recognition in modulated noise relative to steady-state noise (i.e., speech masking release). It has been hypothesized, but not shown, that masking release is attributed to spectral resolution and temporal fine structure (TFS) provided by acoustic hearing. To address this question, speech masking release, spectral ripple density discrimination thresholds, and fundamental frequency difference limens (f0DLs) were evaluated in the acoustic-only (A-Only), E-Only, and EAS listening modes in EAS CI users. The spectral ripple and f0DL tasks are thought to reflect access to spectral and TFS cues, which could impact speech masking release. Performance in all three measures was poorest when EAS CI users were tested using the E-Only listening mode, with significant improvements in A-Only and EAS listening modes. f0DLs, but not spectral ripple density discrimination thresholds, significantly correlated with speech masking release when assessed in the EAS listening mode. Additionally, speech masking release correlated with AzBio sentence recognition in noise. The correlation between speech masking release and f0DLs likely indicates that TFS cues provided by residual hearing were used to obtain speech masking release, which aided sentence recognition in noise.

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Investigating the effect of speech stimuli on temporal masking release

Cited by 3 publications

References 0 publications

The effects of temporal envelope confusion on listeners' phoneme and word recognition

The effects of temporal envelope confusion on listeners' phoneme and word recognition

Speech masking release in hybrid cochlear implant users

Speech masking release in Hybrid cochlear implant users: Roles of spectral and temporal cues in electric-acoustic hearing

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