Crackles - Coarse (Rales) Patient Normal Speed play pause Patient Half Speed play pause Seated Diaphragm Listening Tips Course crackles are discontinuous, brief, popping sounds. Similar to the sound of a hook and loop fastener being pulled apart. They have also been described as a bubbling sound. More common during inspiration. Auscultation Areas Aortic Pulmonic Erb's Point Tricuspid Mitral Breath Sounds All Sounds