PROBLEM TO BE SOLVED: To effectively assist a person performing sputum suction.SOLUTION: An information processing method includes a step (A) for counting first occurrence frequency of a sputum sound included in a respiratory sound for a predetermined period recorded at a first timing, a step (B) for counting second occurrence frequency of a sputum sound included in a respiratory sound for a predetermined period recorded at a second timing, and a calculation step (C) for calculating an evaluation value indicating a change in a symptom between the first timing and the second timing from the first occurrence frequency and the second occurrence frequency.SELECTED DRAWING: Figure 2
