Learning with Littmann - Lung Sounds Wheeze - Polyphonic - Auscultation Lesson Polyphonic wheezes are loud, musical and continuous. These breath sounds occur in expiration and inspiration and are heard over anterior, posterior and lateral chest walls. These sounds are associated with COPD and more severe asthma. Listen The patient's position is sitting. Visualize LessonsVesicular - Normal.Vesicular - Diminished.Bronchial.Bronchovesicular.Rhonchi - Low-Pitched Wheezes.Crackles - Fine (Rales).Crackles - Coarse (Rales).Crackles - Early Inspiratory (Rales).Crackles - Late Inspiratory (Rales).Wheeze - Expiratory.Wheeze - Monophonic.✓Wheeze - Polyphonic.Stridor.Sign-in to enable progress reports and certificates.