EMT Website Lung Sound Examples This has nothing to do with the National Regiatry test, but it's really cool to hear these sounds before you go into the field. Normal Breath Sounds Bubbling Rhonchi Coarse Crackles Coarse Crackles & Expiratory Wheeze Coarse Tubular Crackles Expiratory Wheezing 2 (asthma) Fine Crackles 1 Fine-Medium Crackles Gurgling Rhonchi Pericardial Friction Rub Stridor Stridor 3 - croup |