If you live in modern era, you must know this doctor’s equipment which is usually used in a regular examination: stethoscope. However, did you ever search before, who is the inventor of stethoscope? And how did the doctors examine their patients before the stethoscope was invented? He is Rene Laennec, a French physician, who invented a stethoscope. His idea was raising when a woman, a labor of heart and chest disease department in a hospital, told him about their problem to hearing the heart’s beat in some patients. This problem especially meet in the patients with heavy weight. In that era, the doctors directly put their ear in the patient’s chest to hear their heart’s beat. From the labor’s story, Rene suddenly remember the concept of sound propagation in an object from one point to others. Then, he made a stick and use it to hear the patient’s heart, and it works. His invention was happily welcomed in all division in the hospital. Two years later, his invention was published in New England Journal of Medicine. Although the invention of stethoscope was very useful, not every doctor love this invention. Some doctors stated, “He that hath ears to hear, let him use his ears and not a stethoscope.”. However, not only helps the doctors to get the better hearing, but stethoscope also avoids the pudency between the doctor and the patient in examining women chests. So, thanks to Rene Laennec for this invention.