Neurophysiology of spectrotemporal cue organization of spoken language in auditory memory

Moberly, Aaron C.; Bhat, Jyoti; Welling, D. Bradley; Shahin, Antoine J.

doi:10.1016/j.bandl.2014.01.007

Cited by 3 publications

(20 citation statements)

References 30 publications

(55 reference statements)

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“…Three synthetic versions of /bα/ and /wα/ from Nittrouer et al (2013) were used (Figure 2, reprinted from Moberly et al, 2014a): 1) a synthetic /bα/ stimulus with a /bα/-like FRT (30 ms) and ART (10 ms) (termed the /bα/); 2) a /wα/-like FRT (110 ms) and ART (70 ms) (termed the /wα/); and 3) a /bα/-like FRT (30 ms) and a /wα/-like ART (70 ms) (termed the /bα/ wa ). For natural speech, fundamental frequency can differ between /bα/ and /wα/ contexts, and this could serve as a confounding cue.…”

Section: Methodsmentioning

confidence: 99%

“…However, NH native English listeners predominately weight the FRT, compared to the ART, in labeling these CVs (Nittrouer & Studdert-Kennedy, 1986; Nittrouer et al, 2012; Walsh & Diehl, 1991). Interestingly, this perceptual effect was found to be reflected in the dynamics of the mismatch negativity (MMN) (Moberly et al, 2014a). The MMN reflects a pre-attentive auditory-evoked potential (AEP) that occurs 100–300 ms following sound onset and is characterized by a fronto-central negativity elicited during any acoustically discriminable “deviant” sound within a regular stream of “standard” stimuli (Näätänen, 2001; Näätänen et al, 2007; Picton et al, 2000).…”

Section: Introductionmentioning

confidence: 99%

“…The MMN is thought to represent the brain’s response to a mismatch of a stimulus representation to a trace in short- or long-term auditory memory (Näätänen et al, 2011; Pulvemüller & Shtyrov, 2006). In the Moberly et al (2014a) study, the following stimuli were used: a /bα/ CV with /bα/-like FRT and ART; a /wα/ CV with /wα/-like FRT and ART; and a /bα/ wa CV with /bα/-like FRT and /wα/-like ART. The MMN response was found to represent the superposition of two components.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, the later portion of the MMN was larger during the FRT (/bα/ wa versus /wα/, with constant ART but different FRT) than ART (/bα/ wa versus /bα/, with constant FRT but different ART) contrast. Moberly et al (2014a) concluded that the greater MMN elicited during the FRT contrast reflected the weighting strategy or perceptual organization of these cues in auditory memory, such that the FRT representation is weighted more favorably (pushed to the foreground in auditory memory) over the ART representation (pushed to the background).…”

Section: Introductionmentioning

confidence: 99%

“…Importantly, MMN responses have been observed for individuals with CIs listening to both duration and frequency contrasts (Ponton & Don, 1995). In this study, the same synthetic versions of the /bα/-/wα/ contrast documented in the study by Moberly et al (2014a) were used to elucidate the relationship between MMN and weighting strategies in CI users for ART and FRT. Because the adults with CIs tested in the Moberly et al (2014b) study showed variable weighting strategies, with some relying on the spectral cue more than the temporal cue, and vice versa, it was hypothesized that the group who weighted FRT more heavily than ART (the “FRT group”) would show a larger MMN response for the FRT contrast.…”

Section: Introductionmentioning

confidence: 99%

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Acoustic Cue Weighting by Adults with Cochlear Implants: A Mismatch Negativity Study

Moberly

Bhat

Shahin³

2016

Ear &Amp; Hearing

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Objectives Formant Rise Time (FRT) and Amplitude Rise Time (ART) are acoustic cues that inform phonetic identity. FRT represents the rate of transition of the formant(s) to a steady state, while ART represents the rate at which the sound reaches its peak amplitude. Normal hearing (NH) native English speakers weight FRT more than ART during the perceptual labeling of the /bα/-/wα/ contrast. This weighting strategy is reflected neurophysiologically in the magnitude of the mismatch negativity (MMN) – MMN is larger during the FRT than the ART distinction. The present study examined the neurophysiological basis of acoustic cue weighting in adult cochlear implant (CI) listeners using the MMN design. It was hypothesized that individuals with CIs who weight ART more in behavioral labeling (ART-users) would show larger MMNs during the ART than the FRT contrast, and the opposite would be seen for FRT-users. Design Electroencephalography (EEG) was recorded while twenty adults with CIs listened passively to combinations of three synthetic speech stimuli: a /bα/ with /bα/-like FRT and ART; a /wα/ with /wα/-like FRT and ART; and a /bα/wa stimulus with /bα/-like FRT and /wα/-like ART. The MMN response was elicited during the FRT contrast by having participants passively listen to a train of /wα/ stimuli interrupted occasionally by /bα/wa stimuli, and vice versa. For the ART contrast, the same procedure was implemented using the /bα/ and /bα/wa stimuli. Results Both ART- and FRT-users with CIs elicited MMNs that were equal in magnitudes during FRT and ART contrasts, with the exception that FRT-users exhibited MMNs for ART and FRT contrasts that were temporally segregated. That is, their MMNs occurred significantly earlier during the ART contrast (~100 ms following sound onset) than during the FRT contrast (~200ms). In contrast, the MMNs for ART-users of both contrasts occurred later and were not significantly separable in time (~230 ms). Interestingly, this temporal segregation observed in FRT-users is consistent with the MMN behavior in NH listeners. Conclusions Results suggest that listeners with CIs who learn to classify phonemes based on formant dynamics, consistent with NH listeners, develop a strategy similar to NH listeners, in which the organization of the amplitude and spectral representations of phonemes in auditory memory are temporally segregated.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Acoustic Cue Weighting by Adults with Cochlear Implants: A Mismatch Negativity Study

Moberly

Bhat

Shahin³

2016

Ear &Amp; Hearing

Self Cite

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Neural processing of amplitude and formant rise time in dyslexia

Peter

Kalashnikova

Burnham

2016

Developmental Cognitive Neuroscience

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This study aimed to investigate how children with dyslexia weight amplitude rise time (ART) and formant rise time (FRT) cues in phonetic discrimination. Passive mismatch responses (MMR) were recorded for a/ba/-/wa/contrast in a multiple deviant odd-ball paradigm to identify the neural response to cue weighting in 17 children with dyslexia and 17 age-matched control children. The deviant stimuli had either partial or full ART or FRT cues. The results showed that ART did not generate an MMR in either group, whereas both partial and full FRT cues generated MMR in control children while only full FRT cues generated MMR in children with dyslexia. These findings suggest that children, both controls and those with dyslexia, discriminate speech based on FRT cues and not ART cues. However, control children have greater sensitivity to FRT cues in speech compared to children with dyslexia.

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Auditory cortical responses to speech are shaped by statistical learning of short-term speech input regularities

Vaiyapuri

Abel

et al. 2022

Preprint

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Speech perception presents an exemplary model of how neurobiological systems flexibly adjust when input departs from the norm. Dialects, accents, and even head colds can negatively impact comprehension by shifting speech from listeners' expectations. Comprehension improves with exposure to shifted speech regularities, but there is no neurobiological model of this rapid learning. We used electroencephalography to examine human auditory cortical responses to utterances that varied only in fundamental frequency (F0, perceived as voice pitch) as we manipulated the statistical distributions of speech acoustics across listening contexts. Participants overtly categorized speech sampled across two acoustic dimensions that signal /b/ from /p/ (voice onset time [VOT] and F0) to model typical English speech regularities or an expectation-violating accent. These blocks were interleaved with passive exposure to two F0-distinguished test stimuli presented in an oddball ratio to elicit a cortical mismatch negativity (MMN) response. F0 robustly influenced speech categorization when short-term regularities aligned with English but F0 exerted no influence in the context of the accent. The short-term regularities modulated event-related potentials evoked by F0-distinguished test stimuli across both N1 and P3 temporal windows and, for P3 amplitude, there was a strong correlation with perceptual down-weighting of F0. The influence of the short-term regularities persisted to impact MMN in interleaved passive listening blocks when regularities mirrored English but were absent when regularities conveyed the accent. Thus, cortical response is modulated as a function of statistical regularities of the listening context, likely reflecting both early dimension encoding and later categorization.

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Neurophysiology of spectrotemporal cue organization of spoken language in auditory memory

Cited by 3 publications

References 30 publications

Acoustic Cue Weighting by Adults with Cochlear Implants: A Mismatch Negativity Study

Acoustic Cue Weighting by Adults with Cochlear Implants: A Mismatch Negativity Study

Neural processing of amplitude and formant rise time in dyslexia

Auditory cortical responses to speech are shaped by statistical learning of short-term speech input regularities

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