Modeling principles for time-domain simulations of wind instruments in playing situations.
The development of an evolutive free software which simulates the physical behavior of wind instruments in playing situations can be based on the following modular postulates. In an object-oriented context, the virtual instrument is designed as a set of “anticipative” and lumped elements. After connection rules are laid down, new elements are progressively added and each element is separately improved. One example illustrating this approach for single reed instruments includes modeling of air columns by usual waveguide or two-port, considerations about the reed, and a key-pad model. The current state-of-the-art research in acoustics has a great potential for future extensions.
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DUCASSE, Eric (Acoustical Society of America, 2002)For more than a decade, the digital waveguide model for musical instruments has been improved through the simulation of cylindrical and conical bores. But several difficulties remain, such as instabilities due to growing ...
The Hankel transform of first- and second-order tensor fields: definition and use for modeling circularly symmetric leaky waveguides. DUCASSE, Eric; YAACOUBI, Slah (Elsevier, 2010)A tensor Hankel transform'' (THT) is defined for vector fields, such as displacement, and second-order tensor fields, such as stress or strain. The THT establishes a bijection between the real space and the wave-vector ...
DUCASSE, Eric (Journal of the Acoustical Society of America, 2005)Bensa et al. [J. A Coust. Soc. Am. 114(2) 1095-1107 (2003), Section IV] recently proposed a waveguide model for the transverse displacement of a stiff piano string. The study described here is an attempt to cast a complementary ...
Time-domain computation of the response of composite layered anisotropic plates to a localized source DUCASSE, Eric; DESCHAMPS, Marc (Elsevier, 2014)This paper describes how a modal approach in the time-domain can be suitable for calculating the elastodynamic field in a layered plate. This elastodynamic field is generated by impulsive sources located in a small region ...
A nonstandard wave decomposition to ensure the convergence of Debye series for modeling wave propagation in an immersed anisotropic elastic plate DUCASSE, Eric; DESCHAMPS, Marc (Elsevier, 2012)When ultrasonic guided waves in an immersed plate are expressed as Debye series, they are considered as the result of successive reflections from the plate walls. Against all expectations, the Debye series can diverge for ...