PubMed Health⌕ Search
Home/Archive/PubMed

PubMed · 12352617

Temporal processing and speech recognition in cochlear implant users.

Qian-Jie Fu
View original source ↗Export metadata ↓

Abstract

Although the speech recognition performance of cochlear implant patients has steadily improved in recent years, considerable variability remains in implant patient outcomes. Here, we report on a correlation between cochlear implant patients' auditory temporal processing and speech recognition abilities. Modulation detection thresholds were measured as a function of stimulation level; phoneme recognition was also assessed. Results showed marked individual differences in the shape and absolute sensitivity of subjects' modulation threshold functions. Statistical analysis revealed a strong correlation between phoneme recognition scores and subjects' mean modulation thresholds, demonstrating the contribution of temporal processing to implant speech perception. In correlating a basic psychophysical measure to speech performance, these results should contribute toward improved speech processor design and rehabilitation tools for cochlear implant patients.

Explore related subjects

Acoustic StimulationAdultAgedAuditory ThresholdCochleaCochlear ImplantsDeafnessFemaleGenetic VariationHumansLanguage TestsMaleMiddle AgedSpeech PerceptionTime PerceptionTreatment FailureJournal ArticleResearch Support, U.S. Gov't, P.H.S.

Keep this discovery

Explore connections, maps & timelines

BibTeXRIS

Qian-Jie Fu. 2002-09-16. Temporal processing and speech recognition in cochlear implant users.. https://doi.org/10.1097/00001756-200209160-00013

Cite the original work for its findings. Save a collection to share your selection of sources.

KEEP EXPLORING

Related citations

PubMed2003

Evidence for the different additivity of the temporal and frontal generators of mismatch negativity: a human auditory event-related potential study.

The auditory sensory-memory mechanisms in the human brain were investigated using the mismatch negativity (MMN) component of the event-related potential. MMNs were recorded to stimuli deviating from the repetitive standard stimuli simultaneously either in one or two features (frequency, intensity). If the processing of these two features is independent of each other, the MMN to the double deviant should equal the sum of the MMNs elicited by the corresponding single deviants. The double-deviant MMNs were found to be additive at the electrode sites below the Sylvian fissure but not at the frontal scalp areas. The results suggest that the temporal subcomponent of MMN is additive whereas the frontal is non-additive. The pattern of results was similar in ignore and attend conditions, suggesting that the components were not attentionally modulated.

Acoustic Stimulation↗
PubMed2003

A temporal window for the central inhibition of stuttering via exogenous speech signals in adults.

We explored a possible temporal window for central stuttering inhibition via exogenously presented speech signals. Thirteen adults who stutter were asked to read while listening to a continuous vowel /a/, or a repeating 1 s vowel /a/ followed by 1, 3 and 5 s silences. In all conditions, stuttering was significantly reduced. However, the continuous and 1 s repeating conditions showed the greatest reduction in stuttering relative to all other conditions. Furthermore, these conditions did not differ significantly from each other, suggesting a temporal window of at least 1 s for stuttering inhibition induced by a 1 s stimulus. We propose that exogenous speech signals provide an additional speech source that engages mirror neurons for 'on-line' stuttering inhibition during continous speech. Employing dual speech sources results in 'on-line' stuttering inhibition and continuous speech flow. In contrast, endogenous (single source) inhibitory techniques require speech flow to be interrupted and go 'off-line' to derive the mirror neuronal.

Acoustic Stimulation↗
PubMed2003

Rat strain-dependent effects of repeated stress on the acoustic startle response.

Amplitude and habituation of the acoustic startle response were assessed in four recombinant inbred (RI) rat strains. One group from each strain underwent repeated restraint stress, the last session of which was 24h before startle testing while, a second group from each strain was not stressed prior to testing. Additionally, prepulse inhibition of the acoustic startle response, and anxiety behavior in the elevated plus-maze were assessed in separate, non-stressed groups of each strain. In the non-stressed condition, these RI strains differed significantly from each other on all behaviors measured. In the two RI strains that showed the greatest habituation of the startle response, repeated stress resulted in significantly lower acoustic startle amplitude than that seen in non-stressed controls of those strains. In the strains showing low levels of habituation, repeated stressed increased the level. Neither genotype-dependent levels of startle amplitude, prepulse inhibition of the startle response, nor anxiety in the plus-maze were closely related to the effect of stress on either startle amplitude or habituation. The results suggest that genotype-dependent habituation of the startle response may be important in determining whether stress will alter startle amplitude.

Acoustic Stimulation↗