Contribution
Optimized Acoustic Properties of Perpendicular and Parallel Assemblies
* Presenting author
Abstract:
Perpendicular assemblies, or multilayered structures, are constructed with layers laminated along the sound waves direction, while parallel assemblies position layers side-by-side relative to it. Both configurations show significant potential for sound absorption, offering flexible solutions for noise reduction across a wide frequency range in diverse environments. This study focuses on optimizing these assemblies by refining structural and layer parameters to enhance sound absorption. We develop the assemblies using microperforated panels and porous materials, allowing customization and combination to meet specific acoustic needs. The study applies advanced numerical optimization techniques, inversion, and matrix methods to these sound absorber systems, generating custom parameters that maximize absorption effectiveness while minimizing material use. Furthermore, we rigorously evaluate the performance of these assemblies to ensure practical applicability through impedance tube measurements on the manufactured systems, with findings used to refine and validate the design process further. This approach allows the resulting sound absorbers to achieve intended acoustic outcomes across various real-world settings, from architectural spaces to industrial noise control applications. Through this work, we aim to offer a flexible and efficient pathway for designing high-performance acoustic materials that respond to modern noise control demands.