Pulmonary rales are due to the inflammatory response of the lungs, due to different degrees of congestion, edema, and exudation of inflammatory substances from the mucous membrane of the lungs, when the airflow through the mucous membrane of the lungs by respiratory movements causes the sound of impact. Clinically different diseases can have different pulmonary rales, for example, due to bronchitis can be caused, manifested as pulmonary rales as vesicular sounds, and they are manifested as small and medium-sized vesicular sounds that become immobile breath sounds. Bronchial asthma or wheezing bronchitis can be heard as croup in the lungs, which is the sound made when the airflow passes through the narrowed bronchi after a bronchospasm. Pneumonia can appear to have small to medium-sized blister sounds that are fixed to the lesion in the lung and usually do not change. It is also seen in capillary inflammation and can be heard as a twanging sound, which is a very small wet rumble.