Article
Frequency-Dependent Sound Power Estimation: A Comparative Study on a Baffled Plate (en)
* Presenting author
Abstract:
Frequency-dependent sound power describes the acoustic radiation characteristics of a vibrating structure, which is an essential component of acoustic optimization and auralization. Experimental methods, such as the free field method, offer realistic sound power estimations by measuring sound pressure on an envelope surface in an anechoic chamber while the machinery is in operation. However, the experiments are not conducive to iterative optimization processes. Numerical methods like the Boundary Element Method (BEM) and Acoustic Radiation Modes (ARMs) calculate the sound power based on the discretized acoustic radiation surface and the velocity distribution. Because the discretization is for each use case individual, the time-consuming BEM simulation or the pre-calculation for ARMs is required whenever the shape of the surface changes. In this study, we propose a data-driven method designed to accelerate sound power estimation with general applicability for various vibrating surface shapes. We compare the solutions of the data-driven method with experimental methods and numerical simulations in the case of a vibrating baffled plate, offering a comprehensive analysis of the strengths and limitations of data-driven approaches and their potential contributions to acoustic applications.