Abstract
The influence of changes in middle ear impedance with and without serotympanon on the measurement of evoked otoacoustic emissions (EOAE) was investigated in 108 children between 3 and 12 years of age. Children with proven serotympanon never showed good EOAE. In those who only had changes in middle ear impedance without a serotympanon, the decrease in EOAE amplitude was more related to the magnitude of conductive hearing loss than to the change in impedance itself. These results are compared with those of a neonatal screening project in which some of the 532 healthy fullterm newborns showed poor emissions in the first days of life. It seems reasonable to assume that this is due to incomplete pneumatization of the middle ears of these children, especially as a control audiogram later in their lives showed normal hearing thresholds.
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