Heart and Lung Sounds Reference Guide Aortic Pulmonic Erb's Point Tricuspid Mitral Lungs Wheezes - Expiratory Auscultation Reference Signup Now. Unlock lessons and more. SignUp Patient Normal Speed play pause Patient Half Speed play pause Lesson For heart sounds listen to the synthetic sound while reviewing this lesson. Wheezes are adventitious lung sounds that are continuous with a musical quality. Wheezes can be high or low pitched. High pitched wheezes may have an auscultation sound similar to squeaking. Lower pitched wheezes have a snoring or moaning quality. The proportion of the respiratory cycle occupied by the wheeze roughly corresponds to the degree of airway obstruction.Wheezes are caused by narrowing of the airways. The waveform(s) seen above are a chart of sound amplitude (loudness) on the vertical axis against time on the horizontal axis. Listening Tips A summary of the key aspects of this heart or lung sound. Loud, musical and continuous sounds occurring in expiration. Heard over anterior, posterior and lateral chest walls. Auscultation Method The recommended patient position is sitting For this sound, use stethoscope's diaphragm The recommended auscultation position for the stethoscope is posterior-3l Relevant Courses If you wish to review a complete mobile concerning Wheezes - Expiratory Auscultation Reference and related heart sounds, the modules(s) listed below may be useful. Each lesson includes text that explains the auscultatory sound and its clinical significance. The lesson also includes an audio track for playback. A waveform provides a great way to visualize the sounds. Finally, we also include an animation video. For heart sounds, the video illustrates heart muscle and valve movements along with blood flow. For lung sounds, the primary source of the sounds can be seen. Each module also includes a quiz. Intermediate Lung Sounds202 Introduction to Lung Sounds 203 Wheezes - Expiratory Auscultation Reference