Monophonic wheezes are loud, continuous sounds occurring in inspiration, expiration or throughout the respiratory cycle. If they are monophonic it us due to an obstruction in one airway only. The constant pitch of these sounds creates a musical tone. The tone is lower in pitch compared to other adventitious breath sounds. The single tone suggests the narrowing of a larger airway. These lung sounds are heard over anterior, posterior and lateral chest walls. It can be more intense over lung areas affected by partial obstructions.

Maneuver: Seated
Chestpiece Position: Chest wall
Chestpiece: Diaphragm