Examining a Multi SISO Acoustic Control Method and Structural Response

This paper explores the method of Multiple Single-Input-Single-Output (M-SISO) Acoustic Control System (ACS) loops using the Octave method in approximating a Diffuse Acoustic Field (DAF). By employing high-output full-range acoustic devices, this approach allows for a simplified implementation without requiring precise placement of acoustic devices, microphones, or the Device Under Test (DUT). The inherent flexibility of this method enables accurate acoustic testing while reducing complexity in setup and calibration. Furthermore, the study highlights the potential challenges associated with the summation of acoustic devices, particularly in terms of structural response. When multiple sources are combined, unintended resonances and structural interactions may occur, potentially skewing test results. Therefore, this paper emphasizes the importance of minimizing summation effects whenever a DAF is acceptable for meeting test requirements. By leveraging the Octave method within M-SISO control, users can achieve a controlled acoustic environment that effectively supports testing needs without the drawbacks associated with narrowband averaging or intricate placement constraints. These findings underscore the practicality of this approach, providing a reliable means for acoustic testing in various applications. The study offers insights into optimizing test conditions, ensuring accuracy and efficiency while avoiding unwanted structural interactions.