Responses to cochlear normalized speech stimuli in the auditory nerve of cat.

@article{Recio2002ResponsesTC,
  title={Responses to cochlear normalized speech stimuli in the auditory nerve of cat.},
  author={Alberto Recio and William S. Rhode and Michael Kiefte and Keith R. Kluender},
  journal={The Journal of the Acoustical Society of America},
  year={2002},
  volume={111 5 Pt 1},
  pages={
          2213-8
        }
}
Previous studies of auditory-nerve fiber (ANF) representation of vowels in cats and rodents (chinchillas and guinea pigs) have shown that, at amplitudes typical for conversational speech (60-70 dB), neuronal firing rate as a function of characteristic frequency alone provides a poor representation of spectral prominences (e.g., formants) of speech sounds. However, ANF rate representations may not be as inadequate as they appear. Here, it is investigated whether some of this apparent inadequacy… 
View on PubMed
physiology.wisc.edu
23 Citations
Highly Influential Citations
1
Background Citations
7
Methods Citations
3
Results Citations
1

Figures from this paper

23 Citations

Citation Type

Citation Type

The temporal representation of speech in a nonlinear model of the guinea pig cochlea.
TLDR
The guinea pig cochlear model produces a useful simulation of the measured physiological response to simple speech sounds and is therefore suitable for use in more advanced applications including attempts to generalize these principles to the response of human auditory system, both normal and impaired.
Auditory nerve representation of naturally-produced vowels with variable acoustics
An auditory-periphery model of the effects of acoustic trauma on auditory nerve responses.
TLDR
The modeling results indicate that impairment of both outer and inner hair cells contribute to degradation in the tonotopic representation of the formant frequencies in the auditory nerve, and the model is able to predict the effects of frequency-shaping amplification on auditory nerve responses, indicating the model's potential suitability for more rapid development and testing of hearing aid schemes.
Modelling the effects of cochlear impairment on the neural representation of speech in the auditory nerve and primary auditory cortex
Accurate models of normal and impaired neural representations of sound are useful tools in understanding how acoustic stimuli are encoded in the brain, predicting speech intelligibility, and…
Perception of degraded speech sounds differs in chinchilla and human listeners.
  • W. Shofner
  • Physics, Psychology
    The Journal of the Acoustical Society of America
  • 2014
TLDR
It is argued that lengthening of the cochlea during human evolution may have provided one of the auditory mechanisms that influenced the evolution of speech-specific mechanisms.
Reverberation impairs brainstem temporal representations of voiced vowel sounds: challenging “periodicity-tagged” segregation of competing speech in rooms
TLDR
This work examines the ability of 129 single units in the ventral cochlear nucleus of the anesthetized guinea pig to segregate the concurrent synthetic vowel sounds /a/ and /i/, based on temporal discharge patterns under closed-field conditions and offers neurophysiological insights to perceptual organization of complex acoustic scenes under realistically challenging listening conditions.
Effects of Peripheral Tuning on the Auditory Nerve’s Representation of Speech Envelope and Temporal Fine Structure Cues
A number of studies have explored how speech envelope and temporal fine structure (TFS) cues contribute to speech perception. Some recent investigations have attempted to process speech signals to…
Speech encoding in a model of peripheral auditory processing: Quantitative assessment by means of automatic speech recognition
Frequency selectivity in Old-World monkeys corroborates sharp cochlear tuning in humans
TLDR
Measurements of frequency tuning in macaque monkeys, Old-World primates phylogenetically closer to humans than the laboratory animals often taken as models of human hearing, confirm the finding of sharp tuning in humans and have important implications for understanding the mechanical and neural coding of sound in the human cochlea.
Afferent Coding and Efferent Control in the Normal and Impaired Cochlea
TLDR
A conceptual review of auditory nerve physiology in normal and impaired hearing is presented, including both afferent and efferent functions, to provide the reader a framework in which to understand the neural underpinnings of the everyday perceptual difficulties faced by hearing-impaired listeners.
...
1
2
3
...

References

SHOWING 1-10 OF 20 REFERENCES
Discriminability of vowel representations in cat auditory-nerve fibers after acoustic trauma.
TLDR
It is shown that, after acoustic trauma, there is essentially no rate information which would allow the vowels with different F2 frequencies to be discriminated, however, information that could allow discrimination remains in the temporal (phase-locked) aspects of the responses.
Vowel representations in the ventral cochlear nucleus of the cat: effects of level, background noise, and behavioral state.
TLDR
The vowel encoding properties of VCN chopper units support previous interpretations that patterns of auditory nerve convergence on cochlear nucleus neurons compensate for limitations in the dynamic range of peripheral neurons.
Synthetic speech stimuli spectrally normalized for nonhuman cochlear dimensions
TLDR
A synthesizer was developed for creating speech scaled for nonhuman cochleae in which spectra are warped to account for differences in cochlear physiology, and was accomplished via a flexible reimplementation of the KLATT80 speech synthesizer in MATLAB.
The representations of the steady-state vowel sound /e/ in the discharge patterns of cat anteroventral cochlear nucleus neurons.
TLDR
The data presented in this paper suggest that a functional partition of the AVCN chopper population could yield two distinct rate representations in response to a complex stimulus: one that is graded with stimulus level and that, even at rate saturation, maintains a "low contrast" stimulus representation; and a second that maintains a robust, "high contrast", stimulus representation at all levels but that confers less information about stimulus level.
A cochlear frequency-position function for several species--29 years later.
  • D. D. Greenwood
  • Biology
    The Journal of the Acoustical Society of America
  • 1990
TLDR
It is shown that the newer extended data on human cadaver ears and from living animal preparations are quite well fit by the same basic function, which increases the function's value in plotting auditory data and in modeling concerned with speech and other bioacoustic signals.
Representation of vowel stimuli in the ventral cochlear nucleus of the chinchilla
Representation of steady-state vowels in the temporal aspects of the discharge patterns of populations of auditory-nerve fibers.
TLDR
A simple calculation is described which combines rate, place, and temporal information to provide a good representation of the vowels' spectra, including a clear indication of at least the first two formant frequencies.
Encoding of steady-state vowels in the auditory nerve: representation in terms of discharge rate.
TLDR
Rate versus level functions for units with CFs above the first formant can saturate at rates less than the saturation rate to CF to-es or they can be nonmonotonic; these effects are most likely produced by the same mechanism as that involved in two-tone suppression.
Auditory-nerve response from cats raised in a low-noise chamber.
  • M. Liberman
  • Physics
    The Journal of the Acoustical Society of America
  • 1978
TLDR
The data suggest that there is a significant amount of "normal pathology" in the high-CF units from routine animals, and the possible significance of a classification of auditory-nerve units according to spontaneous rate is discussed.
Rate representation and discriminability of second formant frequencies for /ε/‐like steady‐state vowels in cat auditory nerve
Alternate forms of the steady‐state vowel /e/ with second formant peaks located at 1400, 1500, 1700, and 2000 Hz were used to study the representation and discrimination of second formant frequencies…
...
1
2
...