UNCOMFORTABLE LOUDNESS LEVEL ESTIMATING SYSTEM, UNCOMFORTABLE LOUDNESS LEVEL ESTIMATING DEVICE, UNCOMFORTABLE LOUDNESS LEVEL ESTIMATING METHOD, AND COMPUTER PROGRAM FOR SAME

摘要

The invention provides art capable of estimating the uncomfortable loudness level for a user without presenting loud sounds to the user. This uncomfortable loudness level estimating system includes: a biological signal measuring unit that measures the electroencephalogram signals of a user; a sound stimulation output unit that presents the user with a sound stimulation group comprising a first sound, a second sound, and a third sound, which are pure tones having the same frequency and which successively decrease in loudness within a predetermined range; an extracting unit that extracts a feature amount related to the N1-P2 amplitude of the event related potential of the electroencephalogram signals or the wavelet coefficient from the electroencephalogram signals in a predetermined section(s), starting at the time(s) when at least one of the second sound and the third sound were presented; and a determining unit that determines the uncomfortable loudness level with respect to the frequency of the sound stimulation group on the basis of the feature amount extracted by the extracting unit.