Bronchophony
Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.
Summary
Bronchophony is the clear auscultation of a patient's voice through the chest wall. Physiologically, it is observed only between the shoulder blades above the lung root and at the sternal notch. As a pathological phenomenon, it is heard over infiltrated or slightly compressed lung tissue and over dilated bronchi.
Encyclopedia entry (1928–1936)
BRONCHOPHONY (from Greek bronchos- bronchus and phone-sound), clear auscultation of the patient's voice through the chest wall; physiologically B. is observed only between the shoulder blades above the lung root and at the sternal notch; as a pathological phenomenon, B. is auscultated over infiltrated or slightly compressed lung and over dilated bronchi. In both cases, conditions arise for better conduction of sound waves from the bronchi to the surface of the chest wall (Laennec). The diagnostic value of bronchophony is the same as that of bronchial breathing. For greater clarity when auscultating bronchophony, the patient is asked to whisper words, for example, "thirty three."
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“Bronchophony.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/bronchophony/