The present invention corrects estimation results of uncomfortable loudness level estimation that is based on brain waves, and implements safer hearing aid adjustment. An uncomfortable loudness level evaluation system sequentially presents each of a plurality of sound stimuli groups to a user. The sound stimuli groups include at least one sound stimulus, and the frequencies of the sound stimuli groups are different from each other. The system is provided with: an extraction unit for extracting, for each sound stimulus group, information related to an event-related electric potential from a brain wave signal of a user in a predetermined interval in which the presentation time of at least one sound stimulus is established as a starting point; an estimation unit for estimating the uncomfortable loudness level for the user from the information related to the event-related electric potential with reference to a preset standard; and a correction unit for assessing whether the estimated uncomfortable loudness level is higher than a preset maximum uncomfortable loudness level or equal to or less than the maximum uncomfortable loudness level, and correcting each of the uncomfortable loudness levels assessed to be higher than a maximum sound pressure to a sound pressure equal to or less than the maximum uncomfortable loudness level when the ratio of uncomfortable loudness levels assessed to be higher than the maximum uncomfortable loudness level among the determination results for all of the sound stimuli groups is less than a predetermined ratio.
展开▼
