Abstract
The fitting problems of bone-conduction hearing aids for three persons were discussed. They had mixed hearing loss and were using their hearing aids effectively for more than one year. Bone-conduction threshold was ranged between 5 and 40dB at 0.5-2kHz. Their speech intelligibility with bone-conduction hearing aids ranged between 46 and 52% for syllables and between 37 and 90% for words. The main reason for using bone-conduction hearing aids was not for improvement of the intelligibility of speech, but an aesthetical purpose and the inutility of closing the ear hole with an ear mold. The clients were requesting a better fitness of the vibrator and also a lower price for an aid. In the future, the use of these hearing aids in noisy surroundings and decrease of fatigue must be studied on the more scientific basis.
