Hearing Acuity of the Hard of Hearing Child

Abstract

Pure tone audiometry, ENT examination, measurement of difference limen for frequencies (DLF) and measurement of difference limen for formant frequencies (DLFF) were performed on 50 deaf school children, aged from 9 to 13 years old.
There were many of children with moderate hearing loss and conductive type hearing loss.
And it was found a close relation between degree of hearing loss and DLF, DLFF, and it was also found that DLF, DLFF were important tests for the hard of heaping especially refered to communication ability.