Patent ID: 7908144

Claim:
An information processing system comprising: an acquisition unit which acquires a power spectral density of a voice inputted at a mobile terminal having a voice communication function, and position information of a base station device that relayed voice communication of said mobile terminal when said voice was inputted; a storage unit which stores said acquired power spectral density and said acquired position information in association with each other; an acceptance unit which accepts designation of an area; and an output unit which identifies the position information related to said designated area with reference to said storage unit, acquires the power spectral density associated with said identified position information, calculates the average of power spectral densities corresponding to frequencies greater than or equal to a threshold value (a mean power spectral density) for each combination of said acquired power spectral density and position information, calculates the average of the mean power spectral densities in said designated area, obtains a stress level of a user of said mobile terminal in said designated area based on said calculated average of the mean power spectral densities, and outputs the stress level in association with said designated area.