RESONANCE

resonance. Resonance, n. a sound sent back again, an echo

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Res″o‐nance (r?z″?–nans), n. [[Cf. F. résonance, L. resonantia an echo.]] 1. 1. The act of resounding; the quality or state of being resonant.
2. 2. (Acoustics) A prolongation or increase of any sound, either by reflection, as in a cavern or apartment the walls of which are not distant enough to return a distinct echo, or by the production of vibrations in other bodies, as a sounding-board, or the bodies of musical instruments.
Pulmonary resonance (Med.), the sound heard on percussing over the lungs. — Vocal resonance (Med.), the sound transmitted to the ear when auscultation is made while the patient is speaking.