Abstract
The relationship between the hearing levels of 160 cases of sensorineural hearing loss and the accoustic responsiveness of their hearing aids was studied, especially with regard to the difference between congenital hearing loss and non-congenital hearing loss. One hundred and ten cases of congenital hearing loss and 50 of non-congenital were studied. The results are as follows: 1) In 250Hz, the responsiveness gain in hearing aids of congenital hearing loss was about 10 dB higher than that of non-congenital hearing loss. 2) In 500Hz, the hearing aid responsiveness gain in both hearing losses was almost identical. 3) In 1000Hz and 2000 Hz, hearing aid responsiveness gain in noncongenital hearing loss was somewhat greater than that in congenital hearing loss. 4) In congenital hearing loss, a high level gain was revealed in the group that had extensively depended on their auditory senses. 5) The hearing aid responsiveness gain in individuals about 5-20 dB lower than that of the half gain rule.
