Method for counting coughs by analyzing sound signal, server performing same, and non-transitory computer-readable recording medium

A method for counting coughs by analyzing a sound signal, the method comprising:

• determining a plurality of time points in the sound signal;
• extracting a plurality of cropped signals from the sound signal by cropping portions of the sound signal, wherein each of the cropped portions corresponds to a signal with a predetermined time length from each of the determined time points in the sound signal;
• transforming each of the plurality of cropped signals into a spectrogram image, thereby forming a plurality of spectrogram images;
• determining whether each of the plurality of spectrogram images represents a cough by inputting each of the plurality of spectrogram images into a cough determination model, wherein the cough determination model is a classification model trained to classify the inputted spectrogram image into a cough or non-cough;
• determining a plurality of tags according to results determined by the cough determination model, wherein each of the plurality of tags corresponds to each of the plurality of time points, wherein the tag indicates one of the cough and non-cough;
• and
• calculating a total number of coughs included in the sound signal based on the plurality of time points and corresponding tags,
• wherein the calculating the total number of coughs comprises:
• checking the plurality of tags corresponding to the time points in order of the time points,
• counting one cough when the tag corresponding to the time point indicates the cough, and
• not counting cough when the tag corresponding to the time point indicates the non-cough, and
• wherein when a time interval between a first time point at which a corresponding tag indicates the cough and a second time point which is later in order than the first time point and at which a corresponding tag indicates the cough is within a reference time interval, the cough corresponding to the second time point is not counted towards the total number of coughs included in the sound signal and checking starts from the tag corresponding to a third time point which is later in order than the second time point.