Matthew J. Goupell
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View article: Binaural fusion: Complexities in definition and measurement
Binaural fusion: Complexities in definition and measurement Open
Despite the growing interest in studying binaural fusion, there is little consensus over its definition or how it is best measured. This review seeks to describe the complexities of binaural fusion, highlight measurement challenges, provid…
View article: Temporal speech cue perception in listeners with cochlear implants depends on the time between those cues and previous sound energy
Temporal speech cue perception in listeners with cochlear implants depends on the time between those cues and previous sound energy Open
Cochlear implants (CIs) provide precise temporal information that listeners use to understand speech. Other acoustic cues are not conveyed as precisely, making unambiguous temporal speech cues vital to a listener's ability to understand sp…
View article: Increased listening effort and decreased speech discrimination at high presentation sound levels in acoustic hearing listeners and cochlear implant users
Increased listening effort and decreased speech discrimination at high presentation sound levels in acoustic hearing listeners and cochlear implant users Open
The sounds we experience in our everyday communication can vary greatly in terms of level and background noise depending on the environment. Paradoxically, increasing the sound intensity may lead to worsened speech understanding, especiall…
View article: Spectral degradation and carrier sentences increase age-related temporal processing deficits in a cue-specific manner
Spectral degradation and carrier sentences increase age-related temporal processing deficits in a cue-specific manner Open
Advancing age is associated with decreased sensitivity to temporal cues in word segments, particularly when target words follow non-informative carrier sentences or are spectrally degraded (e.g., vocoded to simulate cochlear-implant stimul…
View article: Reduced digit spans and ear dominance using dichotic digits in bimodal cochlear-implant users
Reduced digit spans and ear dominance using dichotic digits in bimodal cochlear-implant users Open
Bimodal stimulation, a cochlear implant (CI) in one ear and a hearing aid (HA) in the other, provides highly asymmetrical inputs. To understand how asymmetry affects perception and memory, forward and backward digit spans were measured in …
View article: Cochlear-implant listeners benefit from training with time-compressed speech, even at advanced ages
Cochlear-implant listeners benefit from training with time-compressed speech, even at advanced ages Open
This study evaluated whether adaptive training with time-compressed speech produces an age-dependent improvement in speech recognition in 14 adult cochlear-implant users. The protocol consisted of a pretest, 5 h of training, and a posttest…
View article: How to vocode: Using channel vocoders for cochlear-implant research
How to vocode: Using channel vocoders for cochlear-implant research Open
The channel vocoder has become a useful tool to understand the impact of specific forms of auditory degradation—particularly the spectral and temporal degradation that reflect cochlear-implant processing. Vocoders have many parameters that…
View article: Letter to the Editor: Discussion of Measurement and Analysis Techniques to Estimate Interaural Place-of-Stimulation Mismatch for Binaural Perception, Re: Staisloff and Aronoff (2021). Comparing Methods for Pairing Electrodes Across Ears With Cochlear Implants, Ear Hear, 42, 1218–1227
Letter to the Editor: Discussion of Measurement and Analysis Techniques to Estimate Interaural Place-of-Stimulation Mismatch for Binaural Perception, Re: Staisloff and Aronoff (2021). Comparing Methods for Pairing Electrodes Across Ears With Cochlear Implants, Ear Hear, 42, 1218–1227 Open
View article: Cochlear–Implant Simulated Signal Degradation Exacerbates Listening Effort in Older Listeners
Cochlear–Implant Simulated Signal Degradation Exacerbates Listening Effort in Older Listeners Open
Objectives: Individuals with cochlear implants (CIs) often report that listening requires high levels of effort. Listening effort can increase with decreasing spectral resolution, which occurs when listening with a CI, and can also increas…
View article: The rapid decline in interaural-time-difference sensitivity for pure tones can be explained by peripheral filtering
The rapid decline in interaural-time-difference sensitivity for pure tones can be explained by peripheral filtering Open
Purpose The interaural time difference (ITD) is a primary horizontal-plane sound localization cue computed in the auditory brainstem. ITDs are accessible in the temporal fine structure of pure tones with a frequency of no higher than about…
View article: How to vocode: Using channel vocoders for cochlear-implant research
How to vocode: Using channel vocoders for cochlear-implant research Open
The channel vocoder has become a useful tool to understand the impact of specific forms of auditory degradation---particularly the spectral and temporal degradation that reflect cochlear implant processing. Vocoders have many parameters th…
View article: Effect of experimentally introduced interaural frequency mismatch on sentence recognition in bilateral cochlear-implant listeners
Effect of experimentally introduced interaural frequency mismatch on sentence recognition in bilateral cochlear-implant listeners Open
Bilateral cochlear-implant users experience interaural frequency mismatch because of asymmetries in array insertion and frequency-to-electrode assignment. To explore the acute perceptual consequences of such mismatch, sentence recognition …
View article: Wave interference at the contralateral ear helps explain non-monotonic envelope interaural time differences as a function of azimuth
Wave interference at the contralateral ear helps explain non-monotonic envelope interaural time differences as a function of azimuth Open
Interaural time differences (ITDs), an important acoustic cue for perceptual sound-source localization, are conventionally modeled as monotonic functions of azimuth. However, recent literature and publicly available databases from binaural…
View article: Effect of experimentally introduced interaural frequency mismatch on sentence recognition in bilateral cochlear-implant listeners
Effect of experimentally introduced interaural frequency mismatch on sentence recognition in bilateral cochlear-implant listeners Open
Bilateral cochlear-implant users experience interaural frequency mismatch because of asymmetries in array insertion and frequency-to-electrode assignment. To explore the acute perceptual consequences of such mismatch, sentence recognition …
View article: Performance on stochastic figure-ground perception varies with individual differences in speech-in-noise recognition and working memory capacity
Performance on stochastic figure-ground perception varies with individual differences in speech-in-noise recognition and working memory capacity Open
Speech recognition in noisy environments can be challenging and requires listeners to accurately segregate a target speaker from irrelevant background noise. Stochastic figure-ground (SFG) tasks in which temporally coherent inharmonic pure…
View article: The recognition of time-compressed speech as a function of age in listeners with cochlear implants or normal hearing
The recognition of time-compressed speech as a function of age in listeners with cochlear implants or normal hearing Open
Speech recognition is diminished when a listener has an auditory temporal processing deficit. Such deficits occur in listeners over 65 years old with normal hearing (NH) and with age-related hearing loss, but their source is still unclear.…
View article: Rate Discrimination Training May Partially Restore Temporal Processing Abilities from Age-Related Deficits
Rate Discrimination Training May Partially Restore Temporal Processing Abilities from Age-Related Deficits Open
View article: Effects of better-ear glimpsing, binaural unmasking, and spectral resolution on spatial release from masking in cochlear-implant users
Effects of better-ear glimpsing, binaural unmasking, and spectral resolution on spatial release from masking in cochlear-implant users Open
Bilateral cochlear-implant (BICI) listeners obtain less spatial release from masking (SRM; speech-recognition improvement for spatially separated vs co-located conditions) than normal-hearing (NH) listeners, especially for symmetrically pl…
View article: Age-Related Changes in Interaural-Level-Difference-Based Across-Frequency Binaural Interference
Age-Related Changes in Interaural-Level-Difference-Based Across-Frequency Binaural Interference Open
Low-frequency interaural time differences and high-frequency interaural level differences (ILDs) are used to localize sounds in the horizontal plane. Older listeners appear to be worse at horizontal-plane sound localization to compared you…
View article: Computed-Tomography Estimates of Interaural Mismatch in Insertion Depth and Scalar Location in Bilateral Cochlear-Implant Users
Computed-Tomography Estimates of Interaural Mismatch in Insertion Depth and Scalar Location in Bilateral Cochlear-Implant Users Open
Hypothesis Bilateral cochlear-implant (BI-CI) users will have a range of interaural insertion-depth mismatch because of different array placement or characteristics. Mismatch will be larger for electrodes located near the apex or outside s…
View article: Support for the frequency dominance region explanation of lateralization of larger than physiologically possible interaural time differences
Support for the frequency dominance region explanation of lateralization of larger than physiologically possible interaural time differences Open
Binaural processing allows humans to localize sound sources in the horizontal plane and communicate in noisy environments at exquisite levels. Underlying these abilities is the computation of interaural time differences (ITDs) and interaur…
View article: Impacts of signal processing factors on perceptual restoration in cochlear-implant users
Impacts of signal processing factors on perceptual restoration in cochlear-implant users Open
Cochlear-implant (CI) users have previously demonstrated perceptual restoration, or successful repair of noise-interrupted speech, using the interrupted sentences paradigm [Bhargava, Gaudrain, and Başkent (2014). “Top-down restoration of s…
View article: Stimulus context affects the phonemic categorization of temporally based word contrasts in adult cochlear-implant users
Stimulus context affects the phonemic categorization of temporally based word contrasts in adult cochlear-implant users Open
Cochlear-implant (CI) users rely heavily on temporal envelope cues for speech understanding. This study examined whether their sensitivity to temporal cues in word segments is affected when the words are preceded by non-informative carrier…
View article: Effects of aging and hearing loss on perceptual and electrophysiological measures of pulse-rate discrimination
Effects of aging and hearing loss on perceptual and electrophysiological measures of pulse-rate discrimination Open
Auditory temporal processing declines with age, leading to potential deleterious effects on communication. In young normal-hearing listeners, perceptual rate discrimination is rate limited around 300 Hz. It is not known whether this rate l…
View article: Children's syntactic parsing and sentence comprehension with a degraded auditory signal
Children's syntactic parsing and sentence comprehension with a degraded auditory signal Open
During sentence comprehension, young children anticipate syntactic structures using early-arriving words and have difficulties revising incorrect predictions using late-arriving words. However, nearly all work to date has focused on syntac…
View article: The effect of target and interferer frequency on across-frequency binaural interference of interaural-level-difference sensitivity
The effect of target and interferer frequency on across-frequency binaural interference of interaural-level-difference sensitivity Open
Across-frequency binaural interference occurs when the sensitivity to changes in interaural differences in a target sound is decreased by a spectrally remote diotic interfering sound. For interaural time differences (ITDs), low-frequency (…
View article: Performance on stochastic figure-ground perception varies with individual differences in speech-in-noise recognition and working memory capacity
Performance on stochastic figure-ground perception varies with individual differences in speech-in-noise recognition and working memory capacity Open
Speech recognition in noisy environments can be challenging and requires listeners to accurately segregate a target speaker from irrelevant background noise. Stochastic figure ground (SFG) tasks, in which temporally coherent inharmonic pur…
View article: The Relationship Between Interaural Insertion-Depth Differences, Scalar Location, and Interaural Time-Difference Processing in Adult Bilateral Cochlear-Implant Listeners
The Relationship Between Interaural Insertion-Depth Differences, Scalar Location, and Interaural Time-Difference Processing in Adult Bilateral Cochlear-Implant Listeners Open
Sensitivity to interaural time differences (ITDs) in acoustic hearing involves comparison of interaurally frequency-matched inputs. Bilateral cochlear-implant arrays are, however, only approximately aligned in angular insertion depth and s…
View article: Interaural-time-difference thresholds for broad band-limited pulses are affected by relative bandwidth not temporal envelope sharpness
Interaural-time-difference thresholds for broad band-limited pulses are affected by relative bandwidth not temporal envelope sharpness Open
Humans are sensitive to interaural time differences (ITDs) conveyed by slow modulations on high-frequency carrier signals. Sensitivity appears to be affected by temporal envelope sharpness, but it is unclear if there is a limit to which sh…
View article: Rate discrimination training may partially restore temporal processing abilities from age-related deficits
Rate discrimination training may partially restore temporal processing abilities from age-related deficits Open
The ability to understand speech in complex environments depends on the brain’s ability to preserve the precise timing characteristics of the speech signal. Age-related declines in temporal processing may contribute to the older adult’s ex…