Med. [ad. Gr. αὐτοφωνία, n. of quality f. αὐτόφωνος self-sounding, f. αὐτο- self, one’s own + φωνή voice.] Observation by a practitioner of the peculiarities of resonance of his own voice, when he places his head close to the chest of a patient, and speaks loudly. Autophonic a., pertaining to autophony.
1862. H. Fuller, Dis. Lungs, 124. Autophony, either directly or through the intervention of a stethoscope … in aid of the diagnosis of thoracic disease. Ibid. The inference that autophonic resonance would vary with the density of the contents of the thoracic cavity.
