Patent ID: 9332357
Filing Date: 2016-05-03
CPC Classification: A61B,H04R

Claim Text:
1. An uncomfortable sound pressure estimation system comprising: one or more memories; and circuitry which in operation is configured to: measure an electroencephalogram signal of a user; present a sound stimulation group including a first sound, a second sound, and a third sound to the user, the first sound, the second sound, and the third sound having a same frequency and having sound pressures in a predetermined range; extract, from the electroencephalogram signal in a predetermined analysis zone defined based on a point of presenting at least one of the second sound and the third sound to the user as a starting point, a characteristic amount of event-related potential associated with at least one of the second sound and the third sound; determine an uncomfortable sound pressure for the frequency of the sound stimulation group, based on the characteristic amount extracted; extract, from the electroencephalogram signal of the user, a point of occurrence of at least one of a plurality of noises constituting periodic noises; predict a next point of noise occurrence from the point of occurrence of the at least one noise extracted; and determine an output timing for the sound stimulation group so that an analysis zone for at least one of the second sound and third sound begins after a predetermined time has elapsed since the predicted next point of noise occurrence.