Distortion product otoacoustic emissions during the first year in term infants: A longitudinal study

Understanding of any age-related differences in distortion product otoacoustic emissions (DPOAEs) during infancy is important for the use of DPOAEs in detection of cochlear impairment in infants. We studied DPOAEs at 10 frequencies of f 2 primary tone between 500 Hz to 10 kHz longitudinally during t...

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Bibliographic Details
Published in:Brain & development (Tokyo. 1979) 2007-07, Vol.29 (6), p.346-351
Main Authors: Zang, Zheng, Jiang, Ze D.
Format: Article
Language:English
Subjects:
Acoustic Stimulation
Age Factors
Apgar Score
Auditory development
Cochlea - physiology
Female
Gestational Age
Hearing Loss - diagnosis
Hearing screening
Humans
Infant, Newborn
Infants
Longitudinal Studies
Male
Otoacoustic emissions
Otoacoustic Emissions, Spontaneous - physiology
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Summary:Understanding of any age-related differences in distortion product otoacoustic emissions (DPOAEs) during infancy is important for the use of DPOAEs in detection of cochlear impairment in infants. We studied DPOAEs at 10 frequencies of f 2 primary tone between 500 Hz to 10 kHz longitudinally during the first year of life in 70 ears of 35 normal term infants. On days 3–5 after birth DPOAE pass rates ranged between the highest 98.6% at f 2 frequencies 6–10 kHz and the lowest 22.9% at 750 Hz. The higher the frequency, the higher was the pass rate. At 6 months the pass rates at various frequencies were generally similar to those on days 3–5, and were greater than 91% across the frequencies of 3–10 kHz. At 12 months the pass rates were 100% or near 100% across 3–10 kHz. During the first year the pass rate was always very low at 750 Hz (
ISSN:0387-7604
1872-7131
DOI:10.1016/j.braindev.2006.10.001