A simple model is presented for rectangular cantilevers when vibrating
in various media. The mass of the surrounding medium affected by the
motion of the lever is calculated. It depends on the dimensions of the
lever, on the excited mode, and on the density of the medium. Althoug
h the viscosity of the media is not taken into account, the resulting
predictions for the resonance frequencies agree well with experimental
data obtained for levers in air and water up to the seventh harmonic.
(C) 1996 American Institute of Physics.