Objective analysis of the voice and many musical instruments can be made by simply photographing the sound wave and measuring time, intensity and timbre from the records. Piano performances cannot be studied in this way because of complexities produced in the sound waves when notes are played simultaneously.
Proceedings of the Iowa Academy of Science
©1930 Iowa Academy of Science, Inc.
"The Iowa Piano Camera: Some Preliminary Findings,"
Proceedings of the Iowa Academy of Science, 37(1), 329-332.
Available at: https://scholarworks.uni.edu/pias/vol37/iss1/91