Cochlear Maturation and Otoacoustic Emissions in Preterm Infants: A Time-Frequency Approach

Abstract

Click-evoked otoacoustic emissions (CEOAEs) from preterm infants were analyzed to characterize developmental changes of cochlear active mechanisms. Due to their strong time-varying properties, CEOAEs were studied with the wavelet transform. Results obtanied in our study give a clear indication that time-frequencies characteristics of CEOAEs are not fully developed in preterm babies aud reach the complete maturation at about 38 wks post-conception. Also, in agreement with previous physiological and behavioral findings, our results show that the maturation of cochlear active mechanisms is not the same along the cochlear partition but exhibit a spatial gradient proceeding from base to apex.

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Document Details

Document Type
Technical Report
Publication Date
Oct 25, 2001
Accession Number
ADA409819

Entities

People

  • F. Grandori
  • G. Tognola
  • M. Parazzini
  • P. Ravazzani

Organizations

  • Polytechnic University of Milan

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Abstracts
  • Amplitude
  • Biomedical Engineering
  • Classification
  • Emission
  • Engineering
  • Frequency
  • Frequency Bands
  • Frequency Domain
  • Maturation
  • Measurement
  • Military Research
  • Wavelet Transforms

Readers

  • Auditory Neuroscience/Auditory Physiology.
  • Fluid Mechanics and Fluid Dynamics.
  • Women's Health and Cancer Risk Research: African American Women and Pregnancy Outcomes.