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Related Experiment Videos

Dead regions and pitch perception.

Martina Huss1, Brian C J Moore

  • 1Department of Experimental Psychology, University of Cambridge, Downing Street, Cambridge, CB2 3EB, United Kingdom.

The Journal of the Acoustical Society of America
|July 16, 2005
PubMed
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Pitch perception in hearing loss dead regions (DRs) is unclear. Results suggest pitch perception requires both place and temporal information, not just temporal coding alone.

Area of Science:

  • Auditory Neuroscience
  • Psychoacoustics
  • Audiology

Background:

  • Hearing loss can create 'dead regions' (DRs) where auditory nerve fibers don't respond.
  • Pitch perception is crucial for understanding speech and music.
  • The mechanisms underlying pitch perception in DRs are not fully understood.

Purpose of the Study:

  • To investigate pitch perception for pure tones within low- and high-frequency dead regions (DRs).
  • To determine if temporal coding alone is sufficient for pitch perception in DRs.
  • To explore the relationship between place and temporal information in pitch perception.

Main Methods:

  • Subjects with hearing loss performed pitch matching tasks using pure tones.
  • Variable-frequency tones were adjusted to match the pitch of fixed-frequency tones.

Related Experiment Videos

  • Pitch matches were assessed within and across ears, considering asymmetric hearing loss.

    • Main Results:

    • Pitch percepts were often erratic for tones within DRs, indicating unclear pitch.
    • Tones within 0.5 octave of a DR were perceived with unclear or abnormal pitch.
    • A unilaterally impaired subject showed pitch matching shifts and preserved some temporal information.

    Conclusions:

    • Pitch perception in DRs is impaired, suggesting a breakdown in auditory processing.
    • Pitch perception of low-frequency tones likely relies on more than just temporal coding.
    • A combination of place and temporal information may be necessary for normal pitch perception.