The auditory brain response was used to study the threshold in neonates without transient otoacoustic emissions. Infants were submitted to: admittance tympanometry contralateral acoustic reflex threshold with stimulus of 0.5, 1, 2, 4 kHz and broad band noise transient and distortion product otoacoustic emissions. 20 infants with no transient otoacoustic emissions (study group) and 101 infants with transient otoacoustic emissions (control group), with ages ranged from birth to eight months, were assessed. MethodsĬross-sectional contemporary cohort study. To study the association between transient otoacoustic emissions and changes in acoustic immittance measurements with 226Hz probe tone in neonates. Considering the hypothesis that middle ear changes can impair the recording of otoacoustic emissions, it is possible that absent otoacoustic emissions in infants could be associated with a light tympanometric change.
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