bronchophony

from The Century Dictionary.

• noun In pathology, an abnormal sound of the voice heard in auscultation of the chest. It is loud, near, and thrilling, but not so distinctly articulated as in pectoriloquy.

from the GNU version of the Collaborative International Dictionary of English.

• noun A modification of the voice sounds, by which they are intensified and heightened in pitch; -- observed in auscultation of the chest in certain cases of intro-thoracic disease.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• noun pathology A modification of the voice sounds observed in auscultation of the chest; used as a diagnostic test