Breath Sounds - Crackles

     You are now listening to a typical example of breath sounds with scattered wet crackles. Also known as rales, these abnormal breath sounds are usually caused by excessive fluid within the airways. This fluid could be due to an exudate, as in pneumonia or other infections of the lung, or a transudate, as in congestive heart failure. You will notice that crackles sound just as they are named, and are typically inspiratory. The crackles in this example are particularly wet sounding, with dry crackles sounding more like rubbing hair together next to your ear or like the sound of opening Velcro.