Abstract
The occurence of thresholdshift due to hearing aid usage is a real possibility, but we should not conclude that hearing aid usage should be discontinued.
We should design hearing aid usage from opposite two points of view. One is educational problem, and another is acoustic trauma.
As I showed and discussed 5 cases in this paper, threshold of hearing impaired children will easily shift by various causes, for example, conductive components, sudden deafness, virus infection, progressive hearingloss, and acoustic trauma by hearing aid usage.
Differential diagnosis of these diseases should be made exactly and carefully by frequent audiological follow up.
