Directional sound source modeling using the adjoint Euler equations in a finite-difference time-domain approach.

摘要: An adjoint-based approach for synthesizing complex sound sources by discrete, grid-based monopoles in finite-difference time-domain simulations is presented. Previously, Stein, Straube, Sesterhenn, Weinzierl, and Lemke [(2019). J. Acoust. Soc. Am. 146(3), 1774–1785] demonstrated that the allows one to consider unsteady non-uniform ambient conditions such as wind flow thermal gradient contrast standard methods of numerical field simulation. In this work, it proven not only ideal but also realistic with directivity characteristics can be synthesized. detail, an oscillating circular piston a real two-way near-field monitor are modeled. The required number terms pressure level deviation between original synthesized source analyzed. Since computational effort independent used synthesis, more reproduced increasing utilized. classical least-square problem solvers, does increase effort, which makes method attractive predicting effect reinforcement systems highly directional under difficult acoustic boundary conditions.