Comparison between real ear gain in hearing aid fitted with cortical responses and the target of NAL-NL2 in pediatric with moderate to severe Sensory neural hearing Loss

Real ear measurement is the most prevalent way of verifying hearing aids in children and adults. Recently, auditory evoked potentials have been used to assess the accuracy of fitting in infants and young children who could not present decent behavioral feedbacks. In the present study, the real ear measurement responses of hearing aids fitted with cortical responses are compared with NAL-NL2 formula. A total of 10 children suffering from moderate to severe hearing loss in the age group of 2 to 4 years were selected. At first, real ear measurement responses were obtained from hearing aids which were fitted with cortical responses and then they were compared with the target of NAL-NL2. Hearing aids which were fitted with cortical responses presented more gain in comparison with NAL-NL2 formula. The amount of P-value was lower than 0/005 in all frequencies and intensities except in the frequency of 500Hz in low intensity level and 4KHz in high intensity level. There was a significant difference in almost all frequencies and intensities between real ear measurement responses and the responses of NAL-NL2 formula (P-Value<0/05). In the current study, real ear response of hearing aids fitted with cortical responses and NAL-NL2 formula were compared. The results showed a significant difference in almost all frequencies and three levels of intensities between real ear responses of hearing aids, which was fitted with cortical responses, and NAL-NL2 formula.