| Abstract: | Variations of amplitude, shape, and latency of evoked responses with time may falsify the recorded ear-characteristics. Reduction of such errors is possible by special stimulation and proper averaging. The evoked responses are recorded qusai-simultaneously and not in separate sets for each sound pressure. For this purpose, the memory (2 048 addresses) of the averager is subdivided into 4 or 8 groups. Each of these groups corresponds to a certain sound pressure. The evoked responses are obtained by cyclic repetition of averaging in all groups (scrambling technique); as each group is reached in turn, its corresponding sound pressure is triggered |
