Encoded-sound determination method

A non-transitory computer-readable storage medium for storing a program which causes a processor to perform processing for encoded-sound determination, the processing comprising:

• executing a first process that includes obtaining information indicating intensities of sound signals, the frequencies being calculated from the sound signals and corresponding to frequencies;
• and
• executing a second process that includes determining whether or not the sound signals are signals of encoded sound, based on whether or not the intensities of the sound signals in predetermined frequency bands that are adjacent to each other in a frequency direction have a difference that is larger than or equal to a predetermined threshold.