amphoric echo

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• amphoric echo — a resonant repetition of a sound heard on auscultation of the chest, occurring at an appreciable interval after the vocal sound …   Medical dictionary

• resonance — 1. Sympathetic or forced vibration of air in the cavities above, below, in front of, or behind a source of sound; in speech, modification of the quality ( e.g., harmonics) of a tone by the passage of air through the chambers of the nose, pharynx …   Medical dictionary