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Dynamic Modeling and Analysis of a Phonograph Stylus

There are many possible choices as to the modeling technique used to represent a mechanical system. The traditional method within phonocartridge development has been the electrical/mechanical analog circuit. The approach taken in this study was to mathematically describe the stylus undergoing transverse vibrations. It is assumed the structure undergoes sinusoidal motion and thus the wave equation for the beam has a known general solution. The boundary conditions are progressively improved to provide a realistic representation of the system. The talk presents new approaches to stylus shank design and includes a computer-drawn animated film of the stylus dynamics.

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