DESPCRIPTIVE OUTLINE The BERAGRAPH features high performance amplifiers specifically designed to obtain high quality evoked potentials signals. With 14 bit averages, the BERAGRAPH can measure an objective auditory threshold a degree of accuracy greater than 5 db and so distinguish end cochlear deafness from retrocochlear deafness. The auditory stimulator gives burst, login and click stimulation presented either in condensation, refraction or alternating from 0 db to 120 db. The masking intensity can be controlled automatically with the stimulating intensity while maintaining the same programmed difference.