On the Approximation with Chebyshev's Q-function to ABR Waveform and The Estimation of Its Characterisitics
On the Approximation with Chebyshev's Q-function to ABR Waveform and The Estimation of Its Characterisitics Nobuko Ikawa, Non-member (Chiba University), Shuichi Kato, Member (Teikyo Heisei University), Tadashi Kurata, Non-member, Masahiro Aruga, Non-member (Tokai University) It is well known that ABR (Auditory Brainstem Responses) waveforms are used when the judge of the brain death or the check of some hearing troubles and so on are needed. The physiological side of this responses is nearly made clear, but the systematic mechanism of them is not investigated sufficiently. Therefore the quantitative estimation of those systematic mechanism is not yet obtained sufficiently. In this paper, firstly the polynomial approximation results of the entire ABR waveform are shown by using the Chebyshev's q-function. Secondarily the tendency of the latency (a parameter of ABR) is considered and compared with the experimental formula which was independently derived from the another data and analysis. Through these discussion it was shown that the indices of the quantitative analysis of characteristics of ABR parameters were given as the polynomial approximate functions of the use of the approximate method applying the Chebyshev's q-function