Amplitude fluctuations in a masker influence lexical segmentation in cochlear implant users

Perry, Trevor T.; Kwon, Bomjun

doi:10.1121/1.4916698

Cited by 2 publications

(2 citation statements)

References 52 publications

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“…), result in larger dilations, for reasons that are not immediately clear. This type of error was previously tracked by Perry and Kwon (2015), who found a relationship between segmentation strategy and the ability to hear speech in noise.…”

Section: Experiments 2: Methodsmentioning

confidence: 58%

“…However, errors on word segmentation (e.g., Unlock the door … as I locked the door … , The dealer shuffled … as The dealership … ), result in larger dilations, for reasons that are not immediately clear. This type of error was previously tracked by Perry and Kwon (2015) , who found a relationship between segmentation strategy and the ability to hear speech in noise.…”

Section: Experiments 2: Effort Patterns Associated With Various Types Of Correct and Incorrect Responsesmentioning

confidence: 58%

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Listening Effort Is Not the Same as Speech Intelligibility Score

Winn

Teece

2021

Trends in Hearing

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Listening effort is a valuable and important notion to measure because it is among the primary complaints of people with hearing loss. It is tempting and intuitive to accept speech intelligibility scores as a proxy for listening effort, but this link is likely oversimplified and lacks actionable explanatory power. This study was conducted to explain the mechanisms of listening effort that are not captured by intelligibility scores, using sentence-repetition tasks where specific kinds of mistakes were prospectively planned or analyzed retrospectively. Effort measured as changes in pupil size among 20 listeners with normal hearing and 19 listeners with cochlear implants. Experiment 1 demonstrates that mental correction of misperceived words increases effort even when responses are correct. Experiment 2 shows that for incorrect responses, listening effort is not a function of the proportion of words correct but is rather driven by the types of errors, position of errors within a sentence, and the need to resolve ambiguity, reflecting how easily the listener can make sense of a perception. A simple taxonomy of error types is provided that is both intuitive and consistent with data from these two experiments. The diversity of errors in these experiments implies that speech perception tasks can be designed prospectively to elicit the mistakes that are more closely linked with effort. Although mental corrective action and number of mistakes can scale together in many experiments, it is possible to dissociate them to advance toward a more explanatory (rather than correlational) account of listening effort.

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Section: Experiments 2: Methodsmentioning

confidence: 58%

Section: Experiments 2: Effort Patterns Associated With Various Types Of Correct and Incorrect Responsesmentioning

confidence: 58%

Listening Effort Is Not the Same as Speech Intelligibility Score

Winn

Teece

2021

Trends in Hearing

View full text Add to dashboard Cite

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Strategic perceptual weighting of acoustic cues for word stress in listeners with cochlear implants, acoustic hearing, or simulated bimodal hearing

Fleming

Winn

2022

The Journal of the Acoustical Society of America

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Perception of word stress is an important aspect of recognizing speech, guiding the listener toward candidate words based on the perceived stress pattern. Cochlear implant (CI) signal processing is likely to disrupt some of the available cues for word stress, particularly vowel quality and pitch contour changes. In this study, we used a cue weighting paradigm to investigate differences in stress cue weighting patterns between participants listening with CIs and those with normal hearing (NH). We found that participants with CIs gave less weight to frequency-based pitch and vowel quality cues than NH listeners but compensated by upweighting vowel duration and intensity cues. Nonetheless, CI listeners' stress judgments were also significantly influenced by vowel quality and pitch, and they modulated their usage of these cues depending on the specific word pair in a manner similar to NH participants. In a series of separate online experiments with NH listeners, we simulated aspects of bimodal hearing by combining low-pass filtered speech with a vocoded signal. In these conditions, participants upweighted pitch and vowel quality cues relative to a fully vocoded control condition, suggesting that bimodal listening holds promise for restoring the stress cue weighting patterns exhibited by listeners with NH.

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Amplitude fluctuations in a masker influence lexical segmentation in cochlear implant users

Cited by 2 publications

References 52 publications

Listening Effort Is Not the Same as Speech Intelligibility Score

Listening Effort Is Not the Same as Speech Intelligibility Score

Strategic perceptual weighting of acoustic cues for word stress in listeners with cochlear implants, acoustic hearing, or simulated bimodal hearing

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