Information processing apparatus and non-transitory computer-readable storage medium for extracting characteristic amounts of a golf ball striking sound

An information processing apparatus that estimates a hit feeling of a golf ball, the apparatus comprising:

• a storage device configured to store respective natural frequencies of an estimation target ball in vibration modes of a plurality of orders, and a measurement result of a striking sound upon the estimation target ball being struck, and
• a processor configured, by executing a program, to perform:
• extracting, by a frequency component digital signal processing of input audio, a plurality of kinds of characteristic amounts of a striking sound which the estimation target ball generates as a sound source upon the estimation target ball being struck;
• and
• estimating, based on a result of the frequency component digital signal processing of input audio, a hit feeling of the estimation target ball based on correlation information and the extracted characteristic amounts,
• wherein the correlation information indicates correlation, for a plurality of kinds of test balls, between a hit feeling which a testing golfer feels at the time of striking a test ball and the plurality of kinds of characteristic amounts of a striking sound which the test ball generates as a sound source upon the test ball being struck,
• wherein in the extracting:
• the respective natural frequencies and the measurement result are read from the storage device;
• and
• a frequency having a peak of a sound pressure within a predetermined range for each of the natural frequencies, a sound pressure of the frequency having the peak of the sound pressure within the predetermined frequency range, and an attenuation time of the frequency having the peak of the sound pressure within the predetermined frequency range are extracted from the measurement result, and
• wherein the plurality of kinds of characteristic amounts includes the frequency, the sound pressure and the attenuation time extracted in the extracting.