Crackling is a term used to describe a type of sound heard during auscultation, which is the practice of listening to the internal sounds of the body. The two crossword solutions for crackling are STATIC (6 letters) and rales (5 letters). STATIC is a low-pitched sound that is continuous and can be heard without a stethoscope. Rales are discontinuous, high-pitched sounds that require a stethoscope to be heard. Both STATIC and rales are associated with abnormal lung conditions such as pneumonia or pulmonary edema.