[Problem] To evaluate, easily and at low cost, the performance of an earphone device used for ear acoustic certification.[Solution] Holes are provided in a plurality of plate-shaped members (201), an artificial eardrum member (202) corresponds to the eardrum of an individual, and the holes provided in each of the plurality of plate-shaped members (201) are connected, whereby the plurality of plate-shaped members (201) are layered over the artificial eardrum member (202) so as to simulate the external auditory canal of the individual.
