Abstract
Power spectra of normal and abnormal ABRs were evaluated. In the normal ABRs, the spectrograms were composed mainly with three major peaks at around 100-300Hz (A peak), 500-700Hz (B peak) and 1000-1100Hz (C peak), (A peak>B peak>C Peak). In the abnormal ABRs, their power spectra revealed the different distribution from the normal ones, a shift of the each peak toward lower or higher frequencies, and the changes in power balance of the peaks. And the morphological abnormalities of ABR were classified by the distinctive feature of their spectrograms. Power spectral analysis could be expected to be able to apply for clinical diagnosis in the neurological field.
