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Updated: May 4, 2026
Infant Auditory Processing and Event-related Brain Oscillations
Published on: July 1, 2015
Wideband reflectance in newborns with present transient-evoked otoacoustic emissions
Insights
This study establishes normal acoustic energy reflectance values in newborns using pure-tone stimuli. The findings reveal a unique reflectance curve configuration for this age group before hospital discharge.
Area of Science:
- Audiology
- Neonatal Hearing Screening
Background:
- Acoustic energy reflectance is a key audiological measure.
- Establishing normative data in neonates is crucial for early detection of hearing impairments.
Purpose of the Study:
- To determine normal values of acoustic energy reflectance in neonates.
- To characterize reflectance patterns using pure-tone stimulation before hospital discharge.
Main Methods:
- Acoustic reflectance was measured in 77 neonates using pure-tone stimuli.
- Transient-evoked otoacoustic emissions and tympanometry were also performed.
- Measurements were taken at 226 Hz and 1 kHz probe frequencies.
Main Results:
- Higher energy reflectance was observed at low frequencies (258-750 Hz).
- Greater energy absorption occurred at medium frequencies (1-3 kHz).
- No significant differences were found between genders or ears.
Conclusions:
- Normal acoustic energy reflectance values were established for the studied neonatal population.
- The data suggest a distinct reflectance curve configuration for neonates.
- This information aids in neonatal hearing assessment.
Purpose:
To characterize the normal values of acoustic energy reflectance obtained with pure-tone stimulation in neonates prior to hospital discharge.
Methods:
Seventy-seven infants (37 girls and 40 boys) were evaluated by measuring acoustic reflectance using pure-tone stimuli, transient-evoked otoacoustic emissions, and tympanometric probe frequencies of 226 Hz and 1 kHz.
Results:
At low frequencies (258-750 Hz), greater energy reflectance was observed, while at medium frequencies (1-3 kHz), greater energy absorption was observed. There was no difference between ears or between genders.
Conclusion:
Normal energy reflectance values were obtained for the studied population. The data indicate a reflectance curve with a distinct configuration for the studied age.
