SOUND PRESSURE EVALUATION SYSTEM, AND METHOD AND PROGRAM THEREFOR

摘要

Provided is a sound pressure evaluation system that objectively measures UCL in a short time and/or with high precision. The sound pressure evaluation system comprises: a biosignal measuring unit that measures EEG signals of a user; a sound database that holds multiple data of pure sound; a presented sound determining unit that determines a presented sound; an output unit that presents the sound determined by the presented sound determining unit to the user as a first sound, and presents a sound with at least the same frequency and sound pressure as the first sound to the user as a second sound at a predetermined time after presenting the first sound; a volume change extracting unit that extracts the volume change between an N1 component with respect to the first sound that adopts the time at which the first sound was presented as a starting point, and that is a negative component of an event-related potential of the EEG, and an N1 component with respect to the second sound that adopts the time at which the second sound was presented as a starting point, and that is a negative component of an event-related potential of the EEG; and a validation unit that determines whether or not the sound pressure of the presented sound is too loud for the user on the basis of the volume change extracted by the volume change extracting unit.