Disclosed is an assessment system for assessing speech sound clarity degree and comfortableness simultaneously and in a short time. The assessment system is provided with a presented speech sound control unit for referring to a speech sound database storing data of a plurality of speech sounds and data of at least one group of the plurality of speech sounds to determine a speech sound to be presented to a user; an auditory stimulus presentation unit for presenting the determined speech sound as a voice to the user; a visual stimulus presentation unit for presenting the determined speech sound as a character to the user; an addition-by-group unit for referring to the speech sound database to add an event-related potential of brainwave signals of the user to speech sounds for each group; a first assessment unit for assessing for each group, on the basis of the event-associated potential added for each of the groups, the comfortableness representing whether or not the user has been listening to the speech sounds comfortably, and assessing at least whether or not the user has been listening with effort to the speech sound, and whether or not the user had felt the speech sound to be noisy; and a second assessment unit for assessing, from the event-related potential, the clarity property representing whether or not the user has been listening with clarity to the speech sound for each speech sound.
HEARING ASSESSMENT SYSTEM, METHOD OF SAME AND PROGRAM OF SAME