Abstract
(1) There were hearing-impaired children in whom their hearing aids did not well adjusted, and they felt annoying by loud sounds and took off their hearing aids frequently. In most of them, the hearing aids were equipped with the highpowered peak-type earphones, and the replacement of them with the low-powered wide-type earphones could help them to use their aids more frequently and effectively than before.
(2) On the other hand, for the children who had severe loss of hearing in high frequency range, the low-powered earphones were not suitable because their power limitation. They should be fitted with the medium-powered semiwide-type (socalled S-type or N-type), and their word intelligibility scores could be improved to the higher values.
(3) Children with severe loss of hearing were fitted with the peak-type earphones because of their high power output, but some children might be annoyed with “hawling” due to their peak characteristics. For these children, the medium-powered wide-type earphones will be suitable, and the children could raise the volume-setting without feedback, resulting in effective use of hearing.
