Rossing, Thomas D., 1929-
M.S. (Master of Science)
Department of Physics
Handbells||Music--Acoustics and physics
Bass handbells are poor radiators of sound at their fundamental frequency. To remedy the situation, Malmark Co. has created a bell made of aluminum instead of the traditional bronze. Holograms were taken of two G1 handbells. The accelerance curves of both bells were plotted. It was found that except for the (2,0) and the (3,0) modes, all the other modes in the bronze and aluminum bells occur at different frequencies. In the bronze bell we observed a family of (m,3#) modes not found in smaller handbells. This was an unexpected result. The mechanical shakers and the magnet-coil vibrators were used to drive different objects and the results compared. At a given current the force spectrum of the Pasco shaker was found to be at a higher level than that of the B&K shaker. In the case of the magnet coil shakers, it was found that the larger the magnet and the coil, the larger the force produced.
Gangadharan, Deepak, "Holographic studies of the normal modes of bass handbells" (1994). Graduate Research Theses & Dissertations. 3394.
Northern Illinois University
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