航空机械装备先进声学测试技术（英文版）——余亮教授在AFME2024上的大会报告，包含了一些团队新的工作和思考。

Abstract: This study focuses on advanced testing techniques in the acoustic field of aviation mechanical equipment, specifically addressing the fan noise issue of turbofan engines in civil aircraft. By applying cyclostationary modeling, the study uncovers the periodic mechanisms behind fan broadband noise, contributing to a better understanding and control of rotating aerodynamic noise sources. An independently developed, world-class duct acoustic mode excitation device, combined with a full-frequency acoustic synthetic aperture asynchronous measurement method, enables precise identification of complex modal distributions in the high-frequency range of compressors. This significantly enhances the accuracy of sound source propagation characteristic measurements. Furthermore, the study introduces a full-frequency acoustic imaging technology tailored for rotor aerodynamic noise imaging in environments with significant interference. This technology provides detailed experimental data to support noise assessment and noise reduction design. Overall, the cyclostationary modeling reveals the hidden periodic features of fan noise, the duct acoustic mode identification technology offers a precise new approach for aviation acoustic experiments, and the full-frequency acoustic imaging technology facilitates accurate localization and evaluation of noise sources.