Archives of internal medicine . s which the proper application of thismethod confers. From the theoretical point of view it is obvious thatthe acoustic phenomena of the chest must respond to every alteration inthe thoracic contents. It only remains for practical purposes to discrimi-nate the vocal attributes of definite organic changes. ^Manuscript submitted for publication May 21. 1912. \ 4f, THE ARCHIVES OF IXTERXAL UEDWIXE Tin vibrations of the vocal cords which produce voice are transmittedin all directions with an intensity dependent on the continuity and elasticproperties of the conducti
Archives of internal medicine . s which the proper application of thismethod confers. From the theoretical point of view it is obvious thatthe acoustic phenomena of the chest must respond to every alteration inthe thoracic contents. It only remains for practical purposes to discrimi-nate the vocal attributes of definite organic changes. ^Manuscript submitted for publication May 21. 1912. \ 4f, THE ARCHIVES OF IXTERXAL UEDWIXE Tin vibrations of the vocal cords which produce voice are transmittedin all directions with an intensity dependent on the continuity and elasticproperties of the conducting tissue. The air stream passing through theglottis takes up the vibrations of the cords ami. according t tin- shapeand >\/.i- of the air chambers above, one or another group of the partialtones contained in the laryngeal note i> magnified by sympathetic reso-nance, giving rise t the varied vowel sounds characterizing tin- property of •?la-tic bodies to magnify sound by sympathetic vibration. Fig. I. Male, aged J>. Supposed!] normal case; v. Pirquel test negative, bulphysical examination revealed slight crackling .ii I• 11 apex and rough right. Tin- negative was taken in the phase ofkdeep inspiration, tin- effort tinspire being continued with nose and mouth closed. The vessels are markedlyinjected with blood and tin- bronchi with air. \>>ic the suspi ioue area of congestion in tin- upper, outer half i left lung. The print illustrates the plainlyvascular constitution of tin- normal right hilus. Note also the shadow of theascending aorta blending with that of the superioi vena cava on the right of themediast inum. i- of fundamental importance in the apprehension of the physical signsof th \tissue vibration can in nun. when powerful enough, read on distanltissue and produce or increase vibrations in it. jusl a- a singing voicicalls forth a response from the wires and sounding board i a
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