A Novel Approach to Discrete-time Domain Simulation of String Sound Field by Means of Combined Modeling

The scope of the paper is the simulation of the sound field radiated by a string in the time domain. Different time domain methods have been successfully implemented for string simulations. These methods not only perform real-time string sound synthesis, but also pressure and particle velocity generated near strings can be obtained. This is very useful to analyze sound field interaction with external physical structures, as well as body guitar, for example. In this paper, the use of a combination of timedomain methods to provide a complete and wider stable –in frequency range– description of sound field generated than classical finite differences approach is proposed. Functional Transformation Method (FTM) and Finite-Difference Time Domain (FDTD) Method supply different advantages, which used in a mixing scheme, give a wider broadband and efficient solution of sound field. Moreover, real-time modification of parameters without stability shortcomings is also feasible.