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Sound localization in newborn human infants

B A Morrongiello1, K D Fenwick, L Hillier

  • 1Department of Psychology, University of Guelph, Ontario, Canada.

Developmental Psychobiology
|December 1, 1994
PubMed
Summary
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Newborn infants can differentiate sound direction and localize sounds within their visual field. Their head orientation responds to both sound onset and shifts in ongoing sound location.

Area of Science:

  • Auditory Neuroscience
  • Developmental Psychology
  • Human Auditory Perception

Background:

  • Sound localization is a critical auditory skill.
  • Understanding early auditory development in neonates is crucial for identifying potential developmental issues.
  • Previous research has established basic sound localization abilities in infants, but neonate capabilities require further elucidation.

Purpose of the Study:

  • To investigate the sound localization abilities of newborns (neonates).
  • To determine if neonates can differentiate sound sources between left and right hemifields.
  • To examine neonates' responses to changes in sound location within a hemifield.

Main Methods:

  • Two experiments were conducted using distinct psychophysical procedures.

Related Experiment Videos

  • Neonates' head orientation responses to auditory stimuli were measured.
  • Stimulus parameters included sound onset and shifts in the location of ongoing sounds.

    • Main Results:

    • Neonates demonstrated the ability to differentiate the hemifield of a sound source.
    • Evidence suggests neonates can localize sounds within hemifields.
    • Neonatal head orientation is influenced by both sound onset and changes in ongoing sound location, indicating sensitivity to multiple auditory cues.

    Conclusions:

    • Newborns possess rudimentary sound localization capabilities.
    • Head orientation in neonates is a complex response modulated by various stimulus parameters.
    • These findings provide insights into the early development of the central auditory system and sound processing in infancy.