[Auditory evoked potentials: monaural and binaural stimulation in cochlear hearing loss]

We have evaluated the auditory brain stem responses of 37 patients with bilateral, symmetrical, cochlear hearing loss, by mono and binaural stimulation. These patients were divided into several groups according to the shape of the pure-tone audiometry curve. It was found that binaural stimulation is better with regard to monoaural, since it results in a significant increase of wave amplitudes (45%) what allows the answers at lower levels of stimulation. Moreover, it was found that patients with uniform hearing loss (relatively good hearing in high frequencies) have a statistically significant shorter latency in contrast to the patients with more severe hearing loss in high frequencies (groups with gradually and perpendicularly decreasing curve of pure-tone audiometry), p < 1%.