Patent ID: 9712931
Date: 2017-07-18
CPC Classifications: A61B,H04R

Claim:
1. A hearing aid gain determination system comprising: one or more memories; and circuitry which in operation is configured to: measure an electroencephalogram signal of a user; determine a frequency of a sound stimulation group including a first sound, a second sound, and a third sound, the first to third sounds being pure tones and having a same frequency; determine sound pressures of the first sound, the second sound, and the third sound so that the respective sound pressures are equal to or less than a predetermined threshold value and that the first sound, the second sound, and the third sound consecutively decrease in sound pressure in this order; present the first sound, the second sound, and the third sound to the user at the determined frequency and sound pressures; extract a characteristic amount concerning time-frequency information of an event-related potential in the electroencephalogram signal in a predetermined time range beginning after a point of presenting each of the first sound, the second sound, and the third sound, the characteristic amount of the event-related potential being extracted based on at least one of an N1 component in response to the first sound, a P2 component in response to the second sound, and a P2 component in response to the third sound; and determine a hearing aid gain for the frequency of the sound stimulation group against a predetermined criterion based on the characteristic amounts extracted by the circuitry.