Signal processing device and signal processing method for performing sound localization processing

A signal processing method of controlling sound localization, the signal processing method comprising:

• filtering, by one or more filter processors, an input acoustic signal through sound localization and generating output signals;
• setting, by a coefficient setter, for the one or more filter processors, a plurality of filter coefficients for use in the one or more filter processors;
• selecting, by a data selection processor, out of the output signals subjected to the sound localization processing by the one or more filter processors, an output signal to be output to a speaker;
• monitoring, by a time measurer, a time for switching the output signals;
• and
• causing, by a controller, the data selection processor to select the output signal in accordance with the time for switching the output signals, wherein
• the plurality of filter coefficients include filter coefficients generated under a plurality of hearing conditions, the plurality of hearing conditions corresponding to a plurality of different hearing positions, respectively.