The invention is mainly to calculate the collected heart sound signals without filtering, to obtain a two-dimensional heart sound data with the horizontal axis as time and vertical axis as frequency, which not only has the advantage of shortening the calculation time, but also can The first heart sound, the second heart sound, the third heart sound, and the fourth heart sound are clearly separated from each other in the heart sound chart, so as to quickly judge and judge the condition, which is helpful for physicians to assist in making judgments during auscultation.本發明創作主要係將收集到之心音訊號在不經濾波處理之狀態下進行運算，以得到一橫軸為時間縱軸為頻率之心音二維圖資料，不僅具有縮短運算時間之優點，同時可將心音圖內第一心音、第二心音、第三心音、第四心音之間明顯區隔開來，以便快速觀看判斷病情，有助於醫師聽診時做為輔助判斷。
