Show sound of 0 voice the sound of the human voice Is as dependent for its pleasant qualities upon the air as it is upon the organs which prod produce tice the sound experiments were made by dr ernst barany of the university of upsala kupsala sweden in which the air with which the lungs are normally filled was replaced by hydrogen the subject under experiment exhaled air and breathed in hydrogen from a rubber bag using the hydrogen as a medium for carrying the sound waves he spoke many test syllables which were studied in many ways and compared with the sounds produced when air was breathed the lighter gas in the body cavities caused some of the so sound und frequencies in the voice to be raised one to two octaves test listeners were able to understand only about two thirds of the syllables spoken |