As the patient says '99' several times, clearly understood '99' auscultated sounds indicate consolidated or atelectic lung areas. Use the slider to reveal the lungs with the consolidated or abnormal areas highlighted.
Skin and Ribs

Blended View


Move slider to reveal lungs

Ask the patient to say "99" several times while auscultating the chest walls. Over consolidated areas "99" is understandable. This is because acoustic filtering is reduced in consolidated lung tissue, which allows better sound transmission.

Compare this breath sound to the recording in the "Bronchophony - Healthy" lesson.