http://www-ccrma.stanford.edu/~jos/waveguide/Dynamic_Terminations.html Dynamic Terminations Perhaps the most glaring lack of realism in all plucked string simulations described thus far is the use of a perfect reflection at the ``bridge.'' A perfectly rigid bridge cannot transmit any sound into the body of the instrument, such as in a violin or guitar. The bridge of a violin can be modeled up to about 5 kHz, for purposes of computing string loss, as a single spring in parallel with a frequency-independent resistance (``dashpot'') [61,62, page 27]. When a traveling wave reflects from the bridge of a real stringed instrument, the bridge moves, transmitting sound energy into the instrument body. How far the bridge moves is determined by the driving-point impedance of the bridge, denoted . The driving point impedance is the ratio of Laplace transform of the force on the bridge to the velocity of motion that results . etc. Ron N
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