HEARING SENSE THRESHOLD LEVEL ESTIMATION APPARATUS, HEARING SENSE THRESHOLD LEVEL ESTIMATION METHOD, AND HEARING SENSE THRESHOLD LEVEL ESTIMATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a hearing sense threshold level estimation apparatus capable of substantially reducing the time required for ABR examination with a high degree of accuracy being maintained, confirmation of waveform disappearance being not necessarily needed.;SOLUTION: A hearing sense threshold level estimation apparatus comprises: a noise removal unit for extracting and removing the noise components contained in the waveform data representing potential waveforms obtained from a subject with sound stimulation applied thereon; and a threshold level determination unit for determining an estimation value for the hearing sense threshold level on the basis of the presence or absence of amplitude of the V wave component in the noise-removed waveform data from which noise components have been removed by the noise removal unit. The threshold level determination unit determines, from the amplitude value of the V wave component, the specified quadratic polynomial approximate expression indicating the hearing sense threshold level characteristic for a stimulation sound pressure, with respect to the noise-removed waveform data. The threshold level determination unit further determines a linear approximate expression indicating an area approximatable by the linear approximate expression among the hearing sense threshold level curves by the quadratic polynomial approximate expression, and estimates the hearing sense threshold level on the basis of the linear approximate expression.;COPYRIGHT: (C)2015,JPO&INPIT