Advantage is taken of the author's theory of the transmission in an acoustic line with an attached branch which alters the intensity and the pressure phase of the transmitted sound. By the measurement of the relative intensities and phases with and without the branch present, it is possible to obtain the components Z1 and Z2 of the impedance, Z = Z1 + iZ2 , of the branch.
Proceedings of the Iowa Academy of Science
©1926 Iowa Academy of Science, Inc.
Stewart, G. W.
"Direct Absolute Measurement of Acoustic Impedance,"
Proceedings of the Iowa Academy of Science, 33(1), 252-252.
Available at: https://scholarworks.uni.edu/pias/vol33/iss1/74