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Human hearing enhanced by noise.

F G Zeng1, Q J Fu, R Morse

  • 1Department of Hearing and Speech Sciences and Program in Neuroscience and Cognitive Science, University of Maryland, College Park, MD 20742, USA. fzeng@hesp.umd.edu

Brain Research
|June 24, 2000
PubMed
Summary
This summary is machine-generated.

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Adding noise can improve hearing, a phenomenon known as stochastic resonance. This study shows noise enhances signal detection in human hearing, suggesting its use in auditory prostheses.

Area of Science:

  • Auditory Neuroscience
  • Sensory Perception
  • Biophysics

Background:

  • Noise is traditionally considered detrimental to signal detection.
  • Stochastic resonance, an effect where noise enhances signal detection, is known in physical and biological systems.
  • The role of stochastic resonance in human sensory systems is largely unexamined.

Purpose of the Study:

  • To investigate the functional significance of stochastic resonance in human auditory perception.
  • To determine if noise enhances signal detection and discrimination in human hearing.
  • To explore the potential application of noise in auditory prostheses.

Main Methods:

  • Psychophysical experiments were conducted on human subjects.
  • Auditory signals were presented using both normal acoustic stimulation and electric stimulation.

Related Experiment Videos

  • Electric stimulation targeted the auditory nerve and the brainstem.

    • Main Results:

    • Psychophysical data demonstrated that noise significantly enhanced signal detection and discrimination.
    • This enhancement was observed across different modes of auditory stimulation.
    • The findings support the beneficial role of noise in auditory processing.

    Conclusions:

    • Noise plays an integral role in normal human auditory processing.
    • Stochastic resonance is a relevant mechanism for enhancing hearing in humans.
    • Incorporating noise into auditory prostheses could improve their efficacy.