Measurement and processing of stringed acoustic instrument signals
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United States of America Patent
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Sep 10, 2002
Grant Date -
N/A
app pub date -
Jul 12, 2001
filing date -
Jan 15, 1999
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Abstract
A system and a method of measuring, decomposing, processing and uniquely recombining forces and vibrations acting on stringed musical instruments (SMI). The system utilizes a digital signal processor and reproduces the musical sound characteristics of an acoustic instrument into high fidelity electrical signals for amplification, processing and/or filtering and reproduction of musical sounds by uniquely exploiting, through measurements and subsequent signal processing, the vector nature of string excitation forces (SEF) and body vibrations of stringed musical instruments. A signal processing system of the current invention also utilizes a plurality of sensors, each responsive to at least one of force, displacement, velocity or acceleration indicative of the vibrational energy of the strings, to produce a sensor signal vector, which is then processed and transformed by a plurality of re-creation filters into a transformed signal vector, and then resynthesized into an output signal. The resynthesized output signal be a microphone output signal, may have acoustic characteristics of another SMI or possess acoustic characteristics of a 'theoretical' SMI.
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