Abstract
Objective audiometry is important to the hearing evaluation and the fitting of hearing aid in infants. However, the improvement, the deterioration and the fluctuation are occasionally experienced among examinations in a long-time. We investigated the threshold change of ABR and ASSR in infant audiometry. Subjects were 78 children, who were examined with ABR or ASSR to predict their hearing level two times or more. We got results the number of improvement, deterioration and fluctuating, were 12 cases (15.3%), 2 cases (2.5%), and 2 cases (2.5%), respectively. Especially, 8 of 18 cases who were examined for the first time till six months old, showed improvement of threshold. Recently, the examinees's age are going to become lower since the beginning of the hearing screening for new born baby. Plural hearing evaluation and a long time follow-up are important for infants.
