5. The annoyance judgment system of claim 1 , wherein, as the peak latency, the circuitry is configured to adopt: a point in time at which a negative component of the electroencephalogram signal in a range from 50 ms to 350 ms from a starting point takes a smallest potential, the starting point being a point in time at which the determined speech sound is presented; or a peak latency that is associated with a template having a highest degree of matching, among previously-provided templates of N1 component waveforms, with the electroencephalogram signal.
5. The annoyance judgment system of claim 1 , wherein, as the peak latency, the circuitry is configured to adopt: a point in time at which a negative component of the electroencephalogram signal in a range from 50 ms to 350 ms from a starting point takes a smallest potential, the starting point being a point in time at which the determined speech sound is presented; or a peak latency that is associated with a template having a highest degree of matching, among previously-provided templates of N1 component waveforms, with the electroencephalogram signal. 6. The annoyance judgment system of claim 5 , wherein the circuitry is configured to take a summation of event-related potentials with respect to a consonant, or with respect to a group of speech sounds whose differences in reference latency is smaller than a predetermined value.