Roger J. Hanson 
Emeritus Professor of Physics
e-mail: roger.hanson@cfu.net
As a follow-up of his studies of the physics of musical stringed
instruments, Emeritus Professor Roger Hanson has been making precision
measurements of fundamental vibrational properties of a brass harpsichord
string. These properties are profoundly affected by nonlinearities
ignored in simple theory and by asymmetries intrinsic to the string.
Professor Hanson's measurements of vibrational characteristics utilizing
a Fast Fourier Transform frequency analyzer are augmented by associated
theoretical studies by Emeritus Professor H. Kent Macomber.
Recent Publications
Roger J. Hanson, H. Kent Macomber, Andrew C. Morrison, and Matthew
Boucher, "Primarily nonlinear effects in a driven asymmetrical
vibrating wire" J. Acoust. Soc. Am. 117, (1), January 2005, pp.
400-412.
Roger J. Hanson, H. Kent Macomber, and Andrew B. Morrison, "Unusual
motions of a nonlinear asymmetrical vibrating string," Proc.
of the Stockholm Music Acoustics Conference (SMAC 03), pp. 731-734
(2003).
R.J. Hanson, H.K. Macomber, A.B. Morrison, "Nonlinear effects
in an asymmetrical vibrating string," Proc. of The International
Symposium on Musical Acoustics (ISMA 01, in Perugia, Italy), pp. 157-161
(2001).
R.J. Hanson, H. Kent Macomber, and M.P. Kassakatis, "Nonlinear
effects in a vibrating string (wire)," Proc. ICA/ASA '98 Int.
Conf. (Seattle, WA, 1998).
R.J. Hanson, J.M. Anderson, and H.K. Macomber, "Measurements
of nonlinear effects in a driven vibrating wire," J. Acoust.
Soc. Am. 96, 3 (1994).
R.J. Hanson, F. W. Halgedahl, & A.J. Schneider, "Anomalous
low-pitched tones from a bowed violin string," Catgut Acoust.
Soc. J. Vol. 2, No. 6, 1-7 (1994).
A composite of the first four publications listed above is available
at composite.
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