Patent ID: 9439013
Filing Date: 2016-09-06
CPC Classification: A61B,H04R

Claim Text:
1. An uncomfortable sound pressure evaluation system comprising: a measurement section configured to measure an electroencephalogram signal of a user; an output section configured to consecutively present a plurality of sound stimulation groups to the user, each sound stimulation group including at least one sound stimulation, and the sound stimulation groups differing in frequency from one another; an extraction section configured to extract, for each sound stimulation group, information concerning event-related potential from the electroencephalogram signal in a predetermined zone defined based on a point of presenting the at least one sound stimulation as a starting point; an estimation section configured to estimate an uncomfortable sound pressure of the user from the information concerning event-related potential against a predefined criterion; a storage section configured to store a predefined maximum uncomfortable sound pressure; and a correction section configured to determine whether the estimated uncomfortable sound pressure is higher than the maximum uncomfortable sound pressure or not, and if, among determination results across all of the plurality of sound stimulation groups, a proportion of those determination results which indicate the uncomfortable sound pressure to be higher than the maximum uncomfortable sound pressure is smaller than predetermined, correcting each uncomfortable sound pressure determined as higher than the maximum uncomfortable sound pressure to a sound pressure equal to or less than the maximum uncomfortable sound pressure.