RECORDING DEVICEE&MP 89.005 Music Recording no date (Figure 3) Picture showing the machine and its inventor, Dr. Milton Metfessel, National Research Council Fellow at the University of Iowa. The apparatus is recording simultaneously the singer's breathing and his voice. His respiration is transmitted to the phonoscope through the rubber
tube around his waist. His voice transmits itself to the undulagraph
through the large receiver he holds in his hand.
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