The period from 1971 to 1984 marks a consolidation of aeroacoustic research around the integration of rigorous theory with realistic flow environments. Researchers pursued robust boundary-condition formulations for acoustics in the presence of flow, enabling more accurate predictions for ducts, jets, and external flows, and laid groundwork for later CFD–aer acoustics coupling. Methodologically, there was a shift toward unifying disparate ad hoc approaches into cohesive frameworks while expanding high-resolution imaging, measurement techniques, and standardized experimental setups to support broader psychoacoustic and materials investigations.