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Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
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Acoustic cue integration in speech intonation recognition with cochlear implants.

Shu-Chen Peng1, Monita Chatterjee, Nelson Lu

  • 1Division of Ophthalmic, Neurological, and Ear, Nose and Throat Devices, Office of Device Evaluation, U.S. Food and Drug Administration, 10903 New Hampshire Ave, Silver Spring, MD 20993, USA. shu-chen.peng@fda.hhs.gov

Trends in Amplification
|July 14, 2012
PubMed
Summary

Cochlear implant (CI) users can identify questions versus statements by listening to prosody, primarily fundamental frequency (F0) changes. Performance varies with listening conditions and hearing status.

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Area of Science:

  • Audiology
  • Speech Perception
  • Hearing Science

Background:

  • Prosodic cues, including fundamental frequency (F0), intensity, and duration, are crucial for distinguishing questions from statements in spoken English.
  • Acoustic analyses reveal that the final bisyllabic word in a sentence typically carries dominant prosodic cues for this contrast.
  • The F0 contour is identified as the primary cue, with intensity and duration playing secondary roles.

Purpose of the Study:

  • To investigate how adult cochlear implant (CI) listeners perceptually weight prosodic cues for question-statement identification.
  • To compare the cue weighting strategies of CI listeners with those of normal-hearing (NH) listeners under various acoustic conditions.

Main Methods:

  • Two tasks were employed: (1) assessing question-statement identification accuracy with natural sentences and (2) evaluating perceptual cue weighting using resynthesized single-word stimuli with manipulated F0, intensity, and duration.
  • Stimuli included naturally uttered sentences and spectrally degraded versions (noise-band-vocoded) for both CI and NH listeners.
  • Logistic models were used to analyze perceptual cue weighting based on listener performance.

Main Results:

  • Seven out of 13 CI listeners demonstrated high accuracy in identifying questions versus statements in natural sentences.
  • CI listeners utilized multiple acoustic cues for question-statement identification, with differential weighting observed based on listening conditions (full spectrum vs. degraded) and hearing status.
  • Performance and cue weighting strategies varied between CI users and NH listeners, highlighting the impact of spectral degradation and amplification status.

Conclusions:

  • Adult CI listeners can utilize prosodic cues, particularly F0, for question-statement identification, though performance can be affected by spectral degradation.
  • The study underscores the complex interplay between acoustic cue availability, listening conditions, and individual hearing status in speech perception for CI users.
  • Findings have implications for understanding speech processing in individuals with hearing loss and optimizing auditory device processing strategies.