Name/Title
STETHOSCOPE, SYMBALLOPHONEEntry/Object ID
2020.19.54Description
1940 - William J. Kerr's Symballophone. Dr. Kerr was the first full-time Professor and Chair of the Department of Medicine at the University of California San Francisco (UCSF) School of Medicine in 1927. His patent for his symballophone used two diaphragm chest pieces rather than bell chest pieces. Sounds from either chest piece could be heard in both ears so that the examiner could compare sounds coming from different parts of the chest. Note the double-looping tube connections of the binaural earpieces, so that each ear could hear the sound from either chest piece