👉 The term "stethographic" refers to a system of visualizing and interpreting the sounds produced by the heart. This system involves using instruments such as tympanometry, which measures the pressure in different parts of the chest, and other methods like the brachial nerve stimulation (BNS) to observe changes in blood flow. In this context, "stethographic" refers to a method of interpreting heart sounds that involves using these instruments to visually perceive the sounds produced by the heart.