聴覚神経伝達逆モデルの一手法

概要

論文の詳細を見る
In this paper we have addressed the problem of resynthesizing stimulus signal from adapted auditory neural firing pattern. The major issues discussed are : new method of nonlinearity inversion and effects of the stimulus signal's properties in forward and reverse outputs. A simple and efficient inner hair cell (IHC) inversion method based on Meddis IHC simulation has been constructed. With this inversion method and in response to tone-bursts of increasing frequencies and intensities, it was possible to reverse-process the nonlinearity of the auditory system and regenerate the estimate of the stimulus signal. Estimated signal showed good recovery of the information such as amplitude, frequency and phase, even in frequencies above 3 kHz. However, at intensities higher than 65 dB, amplitude recovery was not satisfactory enough. We conclude that, in reverse auditory simulations, our inversion method recovers important information pertaining to the identity of the original stimulus signal and could be employed as an IHC output monitoring or evaluation system.
社団法人日本音響学会の論文