Egophony - a


While listening to the lungs with a stethoscope, the patient is asked to pronounce the long-E vowel sound. When the lung field is consolidated (filled with liquid or other solid mass such as tumor or fungus ball), the patient's spoken English long E will sound like a "pure-voweled" long E without the latter's usual offglide. This effect occurs because the solid mass in the lung field will disproportionately dampen the articulated sound's acoustic overtones higher in the harmonic series, transmuting the English long E, in which higher overtones predominate strongly, to a sound (the English long A) in which higher overtones predominate only slightly, i.e., to a markedly lesser degree than in the former sound. This finding is referred to in clinical contexts as the "E to A transition." If associated with fever, shortness of breath, and cough, this E to A transition indicates pneumonia.
Egophony - a

Maneuver: Seated
Chestpiece Position: Chest wall
Chestpiece: Diaphragm